Retrorocket
n. 制动[减速]火箭系统
🗣️ 情景例句
Well keep in touch, ok?
保持联络，好吗？
No, thank you. But it was very kind of you to offer.
不用了，谢谢。承蒙您好意提出。
Litter baskets have been placed under the trees, but people still throw their rubbish everywhere.
树下都已设置了废物筐，但是人们仍到处扔垃圾。