沉思的英文：
contemplate
contemplation
meditation
ponder

参考例句：

He immersed himself in thought.
他陷入沉思。

He is lost in contemplation.
他陷入沉思之中。

To brood or sulk.
郁闷地沉思或愠怒

Pensively sad;melancholy.
愁闷的愁眉苦脸的，沉思的;忧郁的

The ring startled me from my brooding.
铃声使我从沉思中惊醒。

The young girl was lost in a muse.
这女孩陷入了沉思。

An air raid warning stridently interrupted his thoughts.
刺耳的空袭警报声打断了他的沉思。

A devotional exercise of or leading to contemplation.
默念，默想虔诚的心理活动或导致沉思的

The scholar was reticent, aloof, and meditative
这位学者寡言少语、离群索居而且总在沉思

He knitted his brows in deep thought.
他紧锁双眉陷入沉思。

contemplate是什么意思：
v. 思忖，思量，仔细考虑；冥思苦想；注视；预期

contemplate one's navel.
注视着自己的中心问题。

It is just too dangerous to contemplate.
形势太危险了，容不得你盘算思考。

She lay in bed, contemplating.
她躺在床上冥思苦想。

contemplation是什么意思：
n. 注视；沉思；意图

contemplate one's navel.
注视着自己的中心问题。

It is just too dangerous to contemplate.
形势太危险了，容不得你盘算思考。

She lay in bed, contemplating.
她躺在床上冥思苦想。

meditation是什么意思：
n. 冥想；沉思

I meditate in order to relax.
我沉思冥想藉以松弛精神。

meditate a change in the office arrangements
计划改变一下办事处的安排

meditate a trip abroad
计划作一次出国旅行