形容词
中文翻译：费力的
同义词：
['arduous', 'arduous', 'laborious例句：1. The painter painstakingly painted the portrait of the king.（画家费尽心思地绘制了国王的肖像。）']
例句：
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1. The painter painstakingly painted the portrait of the king.
画家费尽心思地绘制了国王的肖像。
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2.The construction of the bridge was a painstaking process.
建造这座桥是一个费时的过程。
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3.The scientist painstakingly studied the effects of pollution on the environment.
科学家仔细研究了污染对环境的影响。