动词
中文翻译：加入
同义词：
['link', 'unite', 'amalgamate']
例句：
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1.They joined forces to tackle the problem.
他们联手解决了这个问题。
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2.The two companies have joined hands to develop a new product.
两家公司联手开发了新产品。
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3.After joining the army, he became a hero in his country.
参军后，他成为了祖国的英雄。