短语
中文翻译：对于
同义词：
['necessary', 'essential']
例句：
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1.The new software is necessary for our daily work.
新软件是我们日常工作所必需的。
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2. The teacher's guidance is necessary for the students to learn effectively.
老师的指导对学生有效地学习是必要的。
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3. This medicine is necessary for treating the patient's condition.
这种药物对治疗病人的状况是必要的。