Also farmers must watch their birds for possible signs of the disease. Birds that appear weak or that drink in an unusually amount of water could be sick.
Also farmers must watch their birds for possible signs of the disease. Birds that appear weak or that drink in an unusually amount of water could be sick.
同时农场工人必须仔细观察饲养的禽类可能会出现发病的症状。看起来比较虚弱或者喝了异乎寻常多的水的禽类都有可能是得病了。