join a clean-up campaign 参加一个大扫除活动
Luckily, many volunteers from all over the world came to Qomolangma to join in the clean-up activity.
幸运的是,许多来自世界各地的志愿者来到珠穆朗玛峰参加清理活动。
Li, together with his 10 classmates made a volunteer group to call on people to join in The "Clean Your Plate Campaign".
李和他的10个同学成立了一个志愿者小组,呼吁人们加入“光盘行动”。
As long as every citizen also realizes its importance and makes join efforts, the day will come soon when people will take in only clean air.
只要每个公民也意识到它的重要性,使加入的努力,这一天很快就会到来,当人们将只在清洁空气。
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