Propylene
n. 丙二醇\\n[化] 丙烯
🗣️ 情景例句
you need to work at it, Grandpa.
你得常练它， 爷爷。
I'm very much obliged to you.
非常感谢您。
Is that hard? I mean, the jazz violin?
弹奏难吗？我是指拉爵士小提琴。