Acetylene welding
[機] 乙炔熔接
?? 詞語組成解析
n. 乙炔, 電石氣\\n[化] 乙炔; 雙亞乙基
a. 焊的\\n[機] 熔接, 焊接, 鍛接
??? 情景例句
Never gamble if you can't afford to lose.
如果你輸不起的話，永遠不要賭博。
It's nothing. Don't mention it.
區區小事，何足掛齒。
Yes?
什么事？