Indiscoverable
a. 难以发现的
🗣️ 情景例句
Closed for repairs.
关门整修。
How many passengers were on the train?
在火车上有多少旅客？
From this the captain was able to piece together all the information that had come to light.
据此，船长可以将所有的那些已经搞清的材料拼凑起来。