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 。
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
。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
。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 。