Hexadiene
[机] 己二烯
🗣️ 情景例句
The leader takes the first ten cards
指挥拿出上面的十张牌，
The samples you asked for will follow by separate post.
贵方所要样品另行邮寄。
We stay at home on Sundays. We play games on Tuesdays and Thursdays.
周日我们呆在家里。周二、周四玩游戏。