Rdb
[计] 关系数据库
🗣️ 情景例句
I don't know how to drive I'm afraid.
恐怕我不懂得怎样开车。
The more a man knows, the less he knows he knows.
懂得越多，就越知道自己懂得不多。
Take a hike!
哪儿凉快哪儿歇着去吧。