1.hit a nerve 触及到某人的神经/痛处

I am afraid you have hit a nerve when you mention his dead wife, and his face darkened.

恐怕你提到他死去的妻子的时候触及了他的伤心事，所以他的脸色阴沉了下来l5yR7Ob,frT_=gHt8O_。

2.in stock 存货

As you know, we have been in urgent need of these items as we have only a few in stock.

如您所知，由于本公司存货已经不多，所以对此项货物的需求极为迫切X*]gofb1gp)Btn0z_ly。

3.as of 截至

As of the beginning of September, the new rules have come into effect, at least in Taipei.

截至九月初，这些新法规至少已经在台北生效了M81HoI]vc#m。

4.of choice 首选

But, for now, he seems to be the candidate of choice among Arabs.

但是，目前，奥巴马似乎是阿拉伯世界最为推崇的候选人Qd7-ti-JH%2[9ap2vX0。