Heeltapping
n. 鞋跟皮层；杯中(或瓶底的)残酒；残剩饮料
🗣️ 情景例句
I Wonder whether they will arrive on time.
我也不知道他能不能准时到。
What are you thinking about?
你正在考虑什么？
Which number do I need, please?
请问我需乘哪路车？