Dienes
[化] 双烯; 二烯烃
🗣️ 情景例句
Have you gotten over your cold?
你感冒好了吗？
I was born anAmerican; I live an American; I shall die an American.
我生下来是美国人，活着是美国人，死时也是美国人。
Hello, Jim! Help yourself to a cake.
你好，吉姆！请随便吃糕点。