Injection piston
[化] 注射柱塞
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
🗣️ 情景例句
A diet cola, please.
一份健怡可乐。
I don't want to be lonely the rest of my life.
可我不想余生过得那么孤独。
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？