从前天开始的。

Since the day before yesterday.

youdao

从前天开始，一股冷空气袭来。天空依然晴朗，太阳大大的，但这并不能阻止气温下降了8到10度。

A strong cold wind came from the day before yesterday. Though it's still sunny, the temperature has fallen soon for about 8 to 10 degrees.

youdao

从前天开始，一股冷空气袭来。天空依然晴朗，太阳大大的，但这并不能阻止气温下降了8到10度。

A strong cold wind came from the day before yesterday. Though it's still sunny, the temperature has fallen soon for about 8 to 10 degrees.

youdao