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
How many people live in Turkey?
有多少人在土耳其生活？
I'm going to tell him what to answer.
我正要告诉他应该如何回答。
There is only one difference between an old man and a young one:
老年人和年轻人之间仅仅有一个不同：