Injection piston
[化] 注射柱塞
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
🗣️ 情景例句
Be patient whit him, he's a child.
耐心点，他还是个小孩。
I hesitate to ask you, but will you lend me some money?
也许我不该问你，你能借我一些钱吗？
Good morning, nurse.I was to see the dentist,please.
早上好，护士。我想见牙科医生。