The crocodile was crawling along the riverbed .

这条鳄鱼正沿着河床爬行。

More than once , you 've caught him crawling in your ventilation ducts

你不止一次发现他在你家的通风管道里爬行

I 'm tempted to see if he is serious , but that might seem like crawling back .

我有点动心，想试探一下他是不是说真的，但这样可能好像是爬回去乞求收留。

Around the rock the water calmed down , and drifting along I noticed these two opalescent nudibranchs crawling over each other .

在岩石周围的海水平静了下来和随波逐流的时候，我注意到有两个乳白色裸鳃类动物在互相爬行。

Suppose as infants we had learned to fear failure . Many of us would still be crawling around on all fours .

试想一下如果在婴幼儿时期我们就学会了惧怕失败，那么我们当中的很多人也许至今还在用四肢爬行。