词典释义：
drain (someone) of their physical or mental resources; tire out
使精疲力竭
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her day out had exhausted her 一天的出游使她精疲力竭
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[as adj.
exhausting ]it had been a long and exhausting day .那是十分漫长，让人疲惫不堪的一天。
use up (resources or reserves) completely
用完，用光，耗尽（资源，储备物）
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the country has exhausted its treasury reserves .该国的财源已被耗尽。
expound on, write about, or explore (a subject or options) so fully that there is nothing further to be said or discovered
详尽无遗地论述（或探讨）（某一题目或各种选项）
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she seemed to have exhausted all permissible topics of conversation .她似乎已将能谈的话题都谈了。
expel (gas or steam) from or into a particular place
排放，排出（气体，蒸汽）。
waste gases or air expelled from an engine, turbine, or other machine in the course of its operation
（排出的）废气
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buses spewing out black clouds of exhaust 喷着团团黑色浓烟的公共汽车
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[as modifier]
exhaust fumes .废气。
[count noun]the system through which such gases are expelled
排气系统
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[as modifier]
an exhaust pipe .排气管。
"mid 16th cent. （in the general sense ‘draw off or out’）： from Latin