Dialkene
二烯烃
🗣️ 情景例句
I've got to call a caterer.
我应该给宴会承办者打一个电话。
My favorite game when I was a child was making snow angels in the freshly fallen snow.
我在孩提时代最喜欢玩的游戏，是在刚下的雪上堆雪天使。
I have two cats. One is white, the other is black.
我有两只猫，一只是白猫，另一只是黑猫。