Idiopathically
突发性地\\n特发地
🗣️ 情景例句
It's about the size of the United States, but it has a population of only 16.5 million.
它和美国一般大，但人口却只有一千六百五十万。
You cannot have two forenoons in the same day.
一日之中不可能有两个上午。
Cut it out.
省省吧。