Cccdna
[化] 共价闭环DNA
🗣️ 情景例句
Does two o'clock sound alright?
两点钟好吗？
This problem is hard to solve.
要解决这个问题不简单。
A sound made by tapping on the hull of a ship will be reflected from the sea bottom,
敲打船体所发了的声音会从海底传回来，