adj.吃力的，谨慎的
v.努力争取(for)( labor的过去式和过去分词 )，苦干，详细分析，（指引擎）缓慢而困难地运转
They have labored to complete the job.
他们努力完成这一工作。
I was close enough to the elk to hear its labored breathing.
我离那头麋鹿非常近，能听见它吃力的呼吸声。
They labored under the disadvantage of not having enough money.
他们苦于得不到足够的资金.
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