Killo
黑斑
🗣️ 情景例句
Typing is easy once you get the hang of it.
一旦你掌握诀窍，打字就很简单。
One never loses anything by politeness.
有礼貌对自己不会吃亏。
We are prohibited from smoking on school grounds.
我们被禁止在校园内抽烟。