Central(ized) oiling
[化] 集中润滑
🧩 词语组成解析
[化] 加脂
🗣️ 情景例句
when Susan and Richard were babies?
当Richard和Susan还很小时？
Must be.
一定是。
Well, we listened to lectures about pollution, agriculture, nuclear waste, radiation and so on.
噢，我们听取有关污染、农业、核废料、辐射等讲座。