Unobservability
不可观察性
🗣️ 情景例句
I'm afraid i've brought you a lot of trouble.
恐怕我给你带来了不少麻烦。
If he gets scared at the night noises, be patient with him.
如果他晚上感到害怕，请你们多多见谅。
Who told you that?
谁告诉你的？