alkyl

n. 烷基, 烴基\\na. 烷基的, 烴基的

acid ['?s?d]

adj. 酸味的;尖刻的;酸的;酸性的; n. <化>酸;酸味物質;

acid尖，酸，銳利 →酸；酸的，酸性的

What position do you hold?

你的職位是什么？

We invited two guests to dinner,but they didn't come.

我們邀請了2個客人去吃晚飯，但是他們沒來。

I want to ask you for your advice. When I leave school, I want to be an engineer. For years I have been interested in engineering. I have made tools at home and have written articles for magazines. My father says that engineering is not a suitable subject

我希望得到您的指點。中學畢業后，我希望成為一名工程師。多年來，我一直對這個方面感興趣。我在家制作各種用具，給雜志寫文章。我的父親說工程學不適合女孩子學。他要我學習地理。可是我對這門學科一點也不感興趣。我嘗試閱讀有關這方面的書籍，然而，我感到索然無味。我該?2283