Indefiniteness
无定性; 不定性
🗣️ 情景例句
He told me to call him about my project,
他叫我打电话给他， 跟他谈我的作品计划，
He is a gentle horse that never cast his rider.
驯良的马绝不会把骑手甩倒。
Please give my best regards to your family.
请代我向你们全家致以最诚挚的问候。