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
My educational background and professional experience make me qualified for the job.
我的教育背景和工作经验使我能够胜任这项工作。
No man can be a good ruler unless he has first been ruled.
没受过他人的统治，就不能很好地统治他人。
A quarter to eight.
7点45了。