Hisam
[计] 分层索引顺序存取法
🗣️ 情景例句
What a day!
今天好忙！
The postman always comes at 2 o'clock.
邮递员总是在2点钟来。
Well,you mustn't play in the road.It's dangerous. A car may hit you.
嗯，你不可以在路上玩球。那是很危险的。汽车会撞着你。