Noncompact
非紧的
🗣️ 情景例句
Mom, you're winning!
妈妈， 你赢了！
She had a headache, because of the weather here.
由于这里的天气原因她感到有些头疼。
Porpoises and sharks are natural enemies.
海豚和鲨鱼是天然仇敌，