Hdam
[计] 分层直接存取法
🗣️ 情景例句
How do you feel about this?
你觉得呢？
Excuse me I couldn't tell you beforehand.
对不起我不能事先告诉你。
You can't buy them in the shop before eight o'clock.
上午八点之前你在商店里是买不到东西的。