教室正在上数学课，使我惊愕的是，莉莉进去在第一排坐下了。

There was a math class in progress and, to my dismay, Lily sat down in the front row.

youdao

教室正在上数学课，使我惊愕的是，莉莉进去在第一排坐下了。

There was a math class in progress and, to my dismay, Lily sat down in the front row.

youdao