Indefiniteness
无定性; 不定性
🗣️ 情景例句
Gates close at 5pm sharp.
大门 5 点正关闭。
Do you think it's going to rain tomorrow?
你认为明天将下雨吗？
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？”