劳累的英文：
tired
toil
exhausted

参考例句：

Being tired and unhappy put years on him.
由于劳累和心情不好，他苍老了很多。

But Hunter worked so hard that he overstrained his heart.
但是，亨特工作十分刻苦以致心脏过于劳累。

Incapable or seemingly incapable of being fatigued;tireless.
不懈怠的不能或看起来不能疲倦的;不知劳累的

The great mental strain and overwork shattered his mind.
巨大的精神负担和过度劳累使他心智受损。

Poor health is a necessary result of over-exertion.
体弱是过度劳累的必然结果。

Dazed or confused,eg after working intensely
头昏眼花的(如劳累之后)

Incapable of physical exertion
体力上不能劳累的

Teacher was worn down with fatigue.
老师因劳累而疲乏不堪。

She fainted from sheer weariness.
她纯粹是因为劳累而晕倒的。

Overwork brought on insomnia.
这度劳累引起失眠。

tired是什么意思：
adj. 疲劳的；厌倦的，厌烦的
v. tire的过去式和过去分词

She was tired, tired to the bone.
她疲倦了，彻骨地疲倦了。

Living there is tiring.
住那里很麻烦。

rotate TIRES: Another way to promote even tire wear is to rotate tires
轮换车胎:轮换车胎是增强轮胎均匀磨损的又一办法。

toil是什么意思：
v. 辛苦工作；艰难地行进
n. 辛苦；苦工；圈套

Others toiled and you have come in for the harvest of their toil.
别人辛苦劳作，你们却坐享其成。

They toiled slowly up the hill.
他们吃力地慢慢爬上了山。

The workers toiled all through the night.
工人们通宵达旦地辛勤劳动着。

exhausted是什么意思：
adj. 疲惫的；耗尽的

It is not, of course, exhaustive
当然这是不够详尽的。

The exhaust gas exits through the other exhaust manifold
废气经另外一个排气歧管排出。

The purpose is not to give an exhaustive treatment.
其目的并不是给出全面彻底的处理。