地面上的残碎叶
Hard floating trash have no resistance effect essentially because they raft on the surface of water and are hard to descent.
硬质浮水污物漂浮于水面,难以下潜,基本不阻水。
Cleaning the water surface of trash, pool's bottom and sidewall of swimming pool.
清洁泳池表面的污物, 池底和泳池壁.
英语网 · 英语词汇
英语网 · 双语娱乐资讯
英语网 · 初中英语作文