Alkyl residue

alkyl

n. 烷基, 烃基\\na. 烷基的, 烃基的

residue ['rɛzɪdu]

n. 残余，残渣;余渣，残余物;[法]剩余财产;[林]废材;

sed, sid, sess, sult 表”坐”#词根助记：re反+sid=在后面的=剩余的

All right.

好。

Your friend was here a week ago,wasn't he?

一个星期前，你的朋友曾在这里，是不是？

Undivided attention is another sign of respect. You may have noticed that very few people listen with complete attention. Most people half-listen, and if you ask them to repeat what you have just said, they cannot. They may appear to be listening, but i

“专一”是尊重对方的另一表现。你也许察觉到很少有人一心一意地听别人讲话。多数人只是半心半意地听。如果你请他们复述你刚才说过的话，他们是不可能复述出来的。他们可能看上去是在听着，但是事实上有许多事情在他们头脑里转来转去--购物清单呀，要做的事呀，令人烦恼的事?2274