动词短语
中文翻译：紧张起来
同义词：
['stress', 'strain', 'tense']
例句：
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1.She tensed up when she heard the bad news.
她听到那个坏消息时紧张了起来。
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2. The tension between the two countries has been rising lately.
这两个国家之间的紧张关系最近一直在上升。
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3. He tensed up when he saw his boss approaching.
当他看到老板走过来时，他紧张了起来。