If you mosquito-proof houses, when people get sick, they're sitting in bed -- or in mosquito-proof hospitals, they're sitting in a hospital bed -- and the mosquitoes can't get to them.
如果在防蚊的房屋里， 当人们生病了，坐在床上时， 或者在防蚊的医院中，人们坐在医院的床上时， 蚊子没法去叮咬他们。