Chinese students showed a gradual improvement in physical fitness as 33percent were evaluated as being in good shape in 2020 compared to 26.5 percentin 2016.

as…as 在這句話中干什么成分？

能否剖析一下這句話?

主句：Chinese students showed a gradualimprovement in physical fitness??

中國學生的身體素質逐步提升

緣由從句：as 33 percent were evaluated as being ingood shape in 2020 compared to 26.5 percent in 2016?

由于2020年有33%的學生被評為身體情況好，而2016年為26.5%。

在這個從句中，第一個 as 引導緣由狀語從句。第二個as是介詞，搭配是?be evaluated as（被評估為）。過去分詞短語comparedto...作方法狀語，意為“與......比起來”。