labored ['leɪbəd]

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附加级

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

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。来自辞典例句
They have labored to complete the job. 他们努力完成这一工作。来自辞典例句