Concentrators
(concentrator 的复数) n. 集中者, 浓缩器, 选矿机\\n[计] 集线器, 集中器
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
Could you take a picture for me?
你能帮我拍照吗？
We endeavour to avoid the old, romantic idea of a gusher, which wastes oil and gas.
我们尽量避免使用陈旧天真的喷井方法，那样会浪费石油和天然气。