Some farm's mortality are high than 30%, that is heavily affect the farm efficiency.

有些猪场的死亡率高达30%，严重地影响了猪场的经济效益。

youdao

Some farm's mortality are high than 30%, that is heavily affect the farm efficiency.

有些猪场的死亡率高达30%，严重地影响了猪场的经济效益。

youdao