Bipropargyl
聯丙炔
??? 情景例句
Remember,
別忘了，
I can only afford to watch television for an hour gonight because I have homework to do.
因為我要做家庭作業，所以今晚我只能花一小時看電視。
Because the equipment for adding sound to films had not yet been developed.
因為給電影配音的設備還沒有研制出來。