Schmutzdecke
[医] 去污层(菌类)
🗣️ 情景例句
Sure, Dad. What?
当然， 爸爸。什么事？
Deep rivers move in silence, shallow brooks are noisy.
深水静静流，浅溪潺潺流。
he could no get his arm out.
他的胳膊反倒退不出来了。