走进科学
2019-09-10
阅读（快乐英语高年级） 2019年12期
Mud keeps pigs cool in summer. Pigs have big and fat bodies. They get very hot when it’s warm. But pigs can’t sweat（流汗）， so they stay in mud to keep cool. Pigs also use mud baths（洗澡） to keep bugs（蟲子） away.
2019-09-10
Mud keeps pigs cool in summer. Pigs have big and fat bodies. They get very hot when it’s warm. But pigs can’t sweat（流汗）， so they stay in mud to keep cool. Pigs also use mud baths（洗澡） to keep bugs（蟲子） away.
