形容词
中文翻译：有决心的
同义词：
['stubborn', 'obstinate', 'resolute']
例句：
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1.She is very willful and refuses to listen to anyone's advice.
她非常固执，拒绝听取任何人的建议。
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2. The boy was so willful that he refused to go to school on time.
那个男孩非常固执，以至于他拒绝按时去上学。
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3.The decision was made with great willfulness.
这个决定是经过深思熟虑做出的。