網友回答：
意思連慣，saving the earth how to protect the environment becomes one of the biggest problems in the world. we can find the rubbish not only pollutes our environment but also harms people s health. so we should not throw rubbish onto the ground. some factories
溫馨提醒：隨時光變遷，文中所陳述觀點；準確性、難免有所變動，因此文中觀點僅供參考。
