Valid state
[计] 有效状态
🧩 词语组成解析
🗣️ 情景例句
Chileren should learn about the great accomplishments of their nation.
孩子们应该了解自己国家的伟大成就。
The frog in well knows nothing of the great ocean.
井底之蛙不知汪洋大海。
No problem! Tell me, do I have to take them before or after meals?
“那不难！告诉我，我是在饭前还是饭后吃呢？”