2. Others like to try and blow water back up into the bottle, which can
contaminate the entire supply.
有的猪猪喜欢尝试把水吹回升到瓶子里,它会弄脏了整个水瓶里的循环水。
3. We continually wage war on them, for they
contaminate our food, carry diseases, or devour our crops.
人类不断地同昆虫斗争,因为他们污染食物,传播疾病,吞噬庄稼。