Orthopsida
直瘤海胆目
🗣️ 情景例句
The smog in L.A. is caused by air pollution and water vapor.
洛杉矶的烟雾是由空气污染和水蒸气造成的。
I asked him to lend me a book , but he wouldn't.
我请他把书借给我，但是他不肯。
Of course.
当然可以。