Alkene
[ ['ælki:n] ]
高中 Senior High
n. [化]烯烃,链烯
🗣️ 情景例句
Do I need a visa to go to HongKong?
去香港需要签证吗？
Please do not move.
请不要动。
He struck his attacker on the ear.
他打了那个攻击者一耳光。