That's what I'm here for. 这是我为什么在这儿的原因。
Two and three is five. 2+3等于5。
We're as different as night and day. 我们有天壤之别。
Monkey see, monkey do. 东施效颦。(机械模仿。)
First come, first served. 以先后顺序为准。 It's out of date. 过时了。
TV has its merits and demerits. 尺有所长,寸有所短。
I took advantage of his weakness. 我利用了他的弱点。 I've learned something. 我长了不少见识。
It's a fire hazard. 那会引起火灾呀!
Anything could happen. 什么事都有可能发生。
for future reference 将来可以用来作参考。 behind my back 在我背后。
for a change 换换心情。
Money talks. 有钱能使鬼推磨。 Never say die. 别说丧气话。
Let bygones be bygones. 过去的事情让它过去吧。
Better than nothing. 有总比没有强。
A fair-weather friend. 酒肉朋友。
Every little bit helps. 滴水汇成河。