Alkynyl
炔基
??? 情景例句
I don't think so.
我想不是吧。
Thank you for your nice present.
謝謝你那么好的禮物。
I argued that if I spent less time exhausting myself at exercises in the morning,
我辯解說(shuō)，早晨少耗費(fèi)精力鍛煉，