Backstepping
n. 逐步退焊法\\nv. 往后退（backstep的ing形式）
🗣️ 情景例句
A rolling stone gathers no moss.
滚石不能苔。
Speech is silver,silence is gold.
言语是银，沉默是金。
Dad, we can't put this basket in the car. The car's too full.
爸爸，车里放不下这个篮子，车子里太满了。