Echolocation
[医] 回声测定
🗣️ 情景例句
and we're trying to resolve that problem.
试图解决这类问题。
If it were not for hope, the heart would break.
人是靠希望活著的。
As they grow old, people also accumulate belongings for two other reasons,
随着年纪的增加，人们也因为两个原因而继续积累：