A point that Democratic presidential contenders like to hone in on as they attack Trump's economic policies. Economy and a government that works for all of us, not wealthy campaign contributors.上述句中出现了短语hone in on 是什么含义？如何使用？ 词典上没找到。
...oke of gunpowder, whether it is the "soldiers" in the front line or the masses of self-control, the whole country overcome the difficulties. 老师好！在这个句子中想用whether…or句型同时表达"不管是在前线的士兵还是自律的大众都在克服困难"...
He sat down beside Christina, propping his feet up on the railing, feeling the warmth of the sun against his face, able to relax for the first time in days.句中，against可否换成on/upon, 二者使用在本句中，含义究竟有何差别？
...ous of my inferiority,
for I was hopeless at games."I used to hear so much
about you," he said with a grin. "Then I learned that you were a
member here and I could not resist asking someone to point you out to me.
Though, if you'd looked the least bit as I always imagined I don't think I'd
have d-da...
...st that, when I explained it to people, compelled no one to ask “Why”? about any part of it.All I wanted to be was normal. 请教下 I wanted a past that与compelled no one to ask “Why”? about any part of it.All I wanted to be was normal.是同位语么谢谢
I know whereof I speak. I know whereof I talk about. 老师好！这里的whereof=of which/what,那第一句话为什么不在speak后面加about？whereof中的of跟在主句动词后还是从句动词后？whereof的词性是连词还是副词？像这种where/there/here+介词构成的合成词...