(费力) strenuous;laborious;entail strenuous effort;be a strain ;

He sat behind a desk laboriously writing with an Army issue pen.
他坐在书桌后吃力地写着,用的是一支部队发的钢笔。
来源:《柯林斯高阶英汉双解学习词典》I heard the sound of a bolt being slowly and reluctantly slid open.
我听到门闩被缓慢而吃力地拉开的声音。
来源:《柯林斯高阶英汉双解学习词典》His work was so exacting that by the end of the day he was worn out.
他的工作十分吃力,到一天过完的时候他已经精疲力竭了.
来源:《简明英汉词典》A new noise came from the engines a straining, gasping sound.
发动机发出了一种新的声音, 仿佛一阵阵吃力的哮喘.
来源:英汉非文学 - 百科语料821
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