Subtyping
v. 子类型化（subtype的现在分词）
🗣️ 情景例句
We're planning to buy a house.
我们计划买一栋房子。
Success belongs to the persevering.
坚持到底必获胜利。坚持就是胜利。
Glancing at it briefly, he told me to look again.
他迅速地扫视了一眼，让我再看一遍。