形容词
中文翻译：费力的
同义词：
['hard', 'arduous', 'laborious']
例句：
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1.The task was so laborious that I could hardly keep up.
这项任务如此繁重，我几乎跟不上。
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2. He worked hard to finish the project on time.
他努力工作，按时完成了这个项目。
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3. The farmer had to work laboriously all day long.
农民不得不整天辛苦地工作。