He had his thumb out and held a gas can in his other hand.
他竖起拇指请求搭车，另一只手里握着一个汽油罐。
They might suck their thumb, seek out a blanket or so on.
他们可能吮吸他们的大拇指，寻找毯子或者其他之类的。
If you are going further afield, why not stick out your thumb.
如果你走得很远，为什么不伸出你的拇指。
For me, she stuck out like a sore thumb.
对我来说，她钉在那里就像一个剧痛的手指一样难受。
As a tall foreigner in China I stick out like a sore thumb.
作为一位高大的外国人我在中国太显眼了。
Tom Thumb put out his head for a moment, and then popped it in again. Tom Thumb was a mouse.
汤姆大拇探一下头，又缩了回去。汤姆大拇是只老鼠。
He put in his thumb and he pulled out a plum.
他把拇指伸进（口袋里）拿出一颗杨梅。
Nonetheless, here are some general rules of thumb to sort out these terms.
然而，还是有一些经验可用来区分这些术语的。
Nonetheless, here are some general rules of thumb to sort out these terms.
然而，还是有一些经验可用来区分这些术语的。
应用推荐