Upper cylinder lubrication
[化] 上部汽缸润滑
🧩 词语组成解析
upper
['ʌpə]
adj. 地位较高的;上面的;内地的;地表层的;
n. 鞋帮，靴面;兴奋剂;令人兴奋的经历;
n. 润滑, 注油, 润滑作用\\n[计] 润滑
🗣️ 情景例句
I had a million things to do today.
我今天有成千上万的事要做。
There is a tremendous responsibility involved in raising children.
养育孩子是一桩责任重大的事情。
I've written it all down on this list.
我已经把它写在这张条子上。