Hexadiine
[化] 己二炔
??? 情景例句
Susan's vice-president in charge of new toys and games.
Susan是主管新玩具和新 戲器具的副總裁。
He is working on a book about the Vietnam War.
他正在寫一本關于越戰的書。
What will the money be used for?
這錢打算怎么用？