问题 second与secondary的区别

请问second与secondary 有何区别，谢谢！

问题 at的用法

I found him at his books in the library. 请问：句中的at是什么意思？

问题 amaze, astonish, surprise的区别

问题 英语句子的翻译

An engine operating under road conditions will warm up faster and run more efficiently than the one that is idling.

问题 except的用法

Someone traveling alone,if hungry,injured,or ill,often had nowhere to turn except to the nearest cabin or settlement.

问题 so的省略

Ms. Liu, 23, said she was not optimistic that she would get her money back. 请问该句是不是省略了so

问题 替代与指代的辨别

John is much taller than he was two years ago.请问这he是替代作用还是指代作用？

问题 no amount of的用法

问题 die, dead, died 的区别

问题 than 的用法分析

At a higher energy level than the sub nuclear level described. 这里比较该怎么分析呢？

问题 不用and连接并列成分的句子

问题 alive, living, lively的区别

问题 请教besides和except的区别

问题 hurt的用法

He didn't go to school because his head hurts.这里hurts 作什么词性什么成分，his head hurts在这里是句子还是短语?

问题 exemplification,instantiation,enumeration的区别