帮我翻译成英文~谢谢
5, RS-422 and RS-485 transmission lines that match the description of some
The RS-422 and RS-485 bus network in general resistance to the use of terminating match. But in the short distance and low rates can not consider the terminal match. So under what circumstances do not have to consider matching it » In theory, each receive data signals in the mid-point of sampling, as long as the signal reflection at the beginning of sampling at the low enough to decay can not consider the match. But in practice difficult to grasp, the United States MAXIM companies have an empirical articles referred to the principle can be used to determine what kind of data rate and cable length of time needed to match: When the signal conversion time (rise or fall time) Electrical signals along the bus more than a one-way transmission time for more than three times when it can not match. For example, has limited the slope of the RS-485 interface MAX483 output increase or decrease the minimum time for the 250 ns, typical twisted pair on the signal transmission rate of about 0.2 m / ns (24AWG PVC cable), then as long as the data rate of 250 kb in / s within the length of cable is not more than 16 meters, MAX483 used as a RS-485 interface at the terminal can not match.
General terminal match by terminating resistance methods, Qian Wenyi mentioned, RS-422 bus lines in the remote access and resistance, RS-485 bus lines should be in the beginning and end are subject to termination and resistance. Termination of the resistance in general RS-422 network from 100 Ω, in the RS-485 network from 120 Ω. Impedance of the cable equivalent of resistance, because most twisted pair cables impedance of about 100 ~ 120 Ω. This matching method is simple and effective, but there is a drawback, matching resistance to high power consumption, more stringent restrictions on the power system is not suitable.
In addition a more efficient way of matching the RC match. Use of a capacitor C cut off most of DC components can save power. However, the value of capacitance C is a difficult, power consumption and the need to match the quality of a compromise between.
There is also a diode using the matching method. Such programmes not yet a real "match", but its use diode clamp role of the rapid weakening reflection signal to improve signal quality. Energy-saving significantly.
三年前，我遇见了一个值得我欣赏的人。我疯狂的沉迷于他。
Three years ago, I met someone who deserves my appreciation. I was crazy about him.
雨天担心他有没有加衣服，夏天给他送冰棒和饮料，想念他，等待他，寻找他……
In rainy days, I was worried if he had put up enough clothes; In the summer , I gave him a popsicle and a drink , I missed him, I waited for him, and I looked for him...
然而在喜欢他的这条路上，我意外的发现了一个男孩。他不帅不高，但是却对我特别好。However, I accidentally found a boy. He was not handsome or tall , but he was very good to me.
和他在一起的时候我总是会被保护着，而不是去小心翼翼的关注别人。
When I was with him, I was always be protected, not to pay attention to others careful .
他会在过马路时让我牵着他，会在等车的时候用棉花糖给我挡太阳，会在进出商店时让我先走，会给我买冰激凌付车费，会记得我喝“青梅绿茶”，
He always took my hand when crossing the road, would use the cotton candy to keep out the sun for me when I was waiting for the car. He let me go first when we entered and left the stores, and he would buy me and ice cream and remember I like the taste "Green Plum tea"
会看到我把冰激凌吃到手上时着急给我买卫生纸，会在我跟他说起赵帅时从来不会真的跟我生气，He would buy tissue for me when I eat ice cream, and he was never angry with me when I talked about Zhao Shuai.
会对我说我要学会自己走，没有谁会一直陪着我……
He told me that I should learn to go by myself, no one would be always stay by my side all the time...
总之，和他相处会让我感到很舒服，对我来说他真的是一个很好的哥哥。可能，至少在高中毕业之前我不会放弃那个我唯一用情至深的男孩，但是从今天开始，在喜欢他的同时，也会珍惜身边的人，尤其是对我好的。很感谢你，希望我可以是你永远的妹妹。
In a word, getting along with him made me feel very comfortable. For me, he was really a good brother. Maybe, at least before I graduated from high school, I won't give up the only boy I love, but from today, I will cherish the people around me, especially to me the people who were good to me. Thank you very much, I hope that I can be your sister forever .
I'm sorry, because we have too many courses ,I didn't notice your email.
不好意思,因为学校课程的关系,我现在才看到邮件.
Thank you for treating me as your friend, and as soon as there's a chance,I'll pay a visit to you for sure.
谢谢你把我当作你的朋友,有机会我一定会去拜访你的
Now please let me introduce my girlfriend to you,XXXX
在这里我给你介绍下我的女朋友,XXXX
I am sorry, because the school curriculum, I now see that message.
Thank you, you put me as your friend, I will certainly have the opportunity to visit you.
Here I introduce to you under my girlfriend,
I am sorry, because the school curriculum, I now see that message.
Thank you, you put me as your friend, I will certainly have the opportunity to visit you.
Here I introduce to you under my girlfriend,。
Brett XXXX:
Embarrassed, because the relation of the school course, I now just see mail.
Thank you pair of I regard as you of friend, have an opportunity me certain will visit you.
I give here you my girl friend under the introduction, XXXX(want to send out the enclosure of photograph, here brackets inside need not translation) how do valuation medium information and be iwse consumer to become you of health of each part of factor?
Brett XXXX,
I think I need to apologize to you. Because of my couses in the school, I didn’t see your letter until now. I’m sorry.
Thank you for treating me as your friend, I’m sure I will visit you if I have a chance.
Here I’d like to introduce my girlfriend to you, XXXX
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答：嗨！你好！谢谢你抽中我。很高兴认识你！我来自中国。这是中国的文字，是不是很有趣？我喜欢自己国家的文字，也希望你能理解。只要是你认为漂亮的明信片都可以寄给我！非常感谢！希望我们有见面的一天！也希望我们能够成为朋友！～ · ～ · ～ · ～Hi! How are you? Thank you for selecting ...
