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。
join v.参加，加入.联合，连接。同义句： join in,join up.
