密切的英文：
close
familiar
intimate
frequent

参考例句：

Sedulous attention
密切的注意

Light industry is closely related to agriculture.
轻工业和农业有极密切的关系。

Marked by close acquaintance,association,or familiarity.
亲密的以密切的相识、联系或熟悉为标志的

That politician is too closely identified with the senator to become a member of our committee.
那位政治家因与那位参议员关系太密切而不能成为我们委员会的成员。

Creepy music coming from a graveyard should always be closely investigated.
当墓地有令人毛骨悚然的音乐传出的时候总是应该密切调查。

Thymic tumours and dermoid cysts, although in the anterior mediastinum, may be closely related to the pulmonary trunk
胸腺肿瘤和皮样囊肿，虽然位于前纵隔，也可与肺动脉段密切相连。

The police were watching him closely.
警察在密切监视他。

Ties of trade bind nations in closest intimacy.
贸易往来使国与国之间的关系十分密切。

He's well in with the boss.
他和老板关系很密切。

Police bird - dogged the suspect's movements.
警察密切监视嫌疑犯的活动

close是什么意思：
v. 关闭；封闭；结束，结清；使靠拢，使愈合
adj. 接近的；亲密的；紧密的；严密的；不透气的；势均力敌的
adv. 接近；紧密地
n. 结束；终止

close unchanged
收盘时股价

Wright was close.
怀特是个吝啬的人。

The wound has closed.
伤口已愈合。

familiar是什么意思：
adj. 熟悉的；通晓的；冒昧的，随便的
n. 常客；密友

This familiarity has vanished.
这种亲密已经荡然无存。

Are you familiar with their correlation ?
你了解他们的相互关系吗?

A soft, familiar voice answered.
那边是我熟悉而温和的声音。

intimate是什么意思：
adj. 熟悉的；亲密的；个人的；秘密的；怡人的；精通的
n. 知己，密友
v. 暗示；提示

Both felt that they are very intimate.
二人都认为他们亲密无间。

I have an intimate knowledge of the facts.
我熟知那些事实。

It is very difficult for one to have an intimate friend.
一个人要有一个莫逆之交很难。