Unifrequent
单频的
🗣️ 情景例句
OK. Thank you.
好 ，谢谢。
Don't just shake you head.
别光摇头，想想办法！
For nearly three and a half centuries she lay at the bottom of Stockholm harbour until her discovery in 1956.
这艘大船在斯德哥尔摩港口的海底躺了将近3个半世纪之后，直到1956年才被发现。