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join的同义句为take part in
例句
1、
It costs £ 20 to join.
需交20英镑才可参加。
2、
People of various party allegiances joined the campaign.
各个不同政党的拥护者都参加了这次活动。
3、
I'd like to join an aerobics class to improve my fitness.
我想参加有氧运动训练班来增强体质。
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