Backstepping
n. 逐步退焊法\\nv. 往后退（backstep的ing形式）
🗣️ 情景例句
I waited for you for about a quarter of an hour.
我等了你差不多一刻钟。
The homework took me a whole day.
做家庭作业花了我一整天的时间。
Suddenly, one of the children kicked a ball very hard and it went towards a passing boat.
突然，一个孩子狠狠地踢了一脚球，球便向着一只划过来的小船飞去。