Hisam
[计] 分层索引顺序存取法
🗣️ 情景例句
Art is for enjoying, it shouldn't be wasted.
艺术是用业观赏的，不能糟踢它。
Laugh before breakfast you'll cry before supper.
乐极生悲。
Ken gave up smoking two years ago. He'd been smoking for thirty years.
两年前肯戒了烟，之前他抽了三十年烟。