大拇指的英文：
thumb

参考例句：

the apposition of thumb and forefinger
大拇指与食指并列

The little child took her ear between her thumb and forefinger and tugged it playfully.
小孩用大拇指和食指捏住她的耳朵，拉着玩。

Damn! I hit my thumb with the hammer.
"该死,锤到大拇指了!"

The baby was sucking its thumb.
婴儿正在吮大拇指。

I gave a thumbs-up, and at once the geese took wing
我翘起大拇指，雁群立即展翅起飞。

His sore thumb puffed up.
他那疼痛发炎的大拇指肿起来了。

He held it between the tips of his thumb and forefinger.
他用他大拇指和食指尖拿着它。

He hold it between the tips of his thumb and forefinger.
他用大拇指和食指尖拿著它。

I pressed the thumbtacks into the board with my thumb.
我有用大拇指将图钉钉在板上。

The driver grinned and gave me a thumbs-up sign
汽车司机会意地咧嘴一笑，向我竖起大拇指。

thumb是什么意思：
n. 拇指
v. 翻阅；以拇指拨弄；请求搭便车

thumb slide rules
翼形滑尺

There is a hole in the thumb of his mitten.
他的手套的姆指上有个洞。

He caught his thumb in the door.
他的拇指让门夹住了。

The Jones family is under the thumb of the mother.
琼斯一家人都得听从母亲的。

He is a rule-of-thumb photographer.
他是一个靠经验摄影的摄影家。