Derailleur
n. <法>(自行车)变速器, 装有变速器的自行车
🗣️ 情景例句
Bye, Mom.
再见， 妈妈。
I'm afraid not. She doesn't have any openings in the morning.
恐怕不行。上午她没有空。
This time he was barking so that someone would let him out! Since then, he has developed another bad habit.
这次它叫着让人把它放出去！从那以后，它养成了另外一种坏习惯。