名词
中文翻译：Unknown
同义词：
['target', 'aim', 'concentrate on']
例句：
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1. The hunter aimed his gun at the deer and fired.
猎人把枪瞄准了鹿并开枪。
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2. She focused all her attention on the task at hand.
她全神贯注于手头的任务。
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3. The teacher concentrated on explaining the difficult concept to the students.
老师集中注意力向学生解释这个难懂的概念。