上星期开始的雨季造成了气温的下降，也减少了湖中的氧气水平。

The rainy season set in last week causing the fall in temperature which also depleted the lake's oxygen levels.

youdao

上星期开始的雨季造成了气温的下降，也减少了湖中的氧气水平。

The rainy season set in last week causing the fall in temperature which also depleted the lake's oxygen levels.

youdao