22-06-09 1. guts: 勇气，魄力 I dont have the guts to ask her out. 我不敢约她。 2. nerve: 勇气，胆量 I wanted to ask her out, but I lost my nerve and couldnt go through with it. 我曾想约她出来，但我失去了勇气，说不出口。 I didnt have the nerve to tell him wha...

14-11-06 The microbes living in people's guts are much less diverse than those in humans' closest relatives, the African apes, an apparently long evolutionary trend that appears to be speeding up in more modern societies, with possible implications for human...