Unobservability
不可观察性
🗣️ 情景例句
Not Grandpa.
爷爷不是这种人。
Feel free to bring your brother if he would like to come.
如果喜欢的话，你不妨带令兄一起来。
Assuming that his family had been killed during an air raid, Hans settled down in a village fifty miles away where he had remained ever since.
汉斯以为全家人都在空袭中遇难，于是便在距此50英里外的一座村子里定居下来，直至当日。