大脑需要持续供氧。The brain requires a constant supply of oxygen.氧气泡a bubble of oxygen医院中抗甲氧西林金黄色葡萄球菌感染病例不断增长的发生率rising rates of MRSA infections in hospitals...
Armadillos aren't the only creatures who rely on gravity to get the ball rolling.犰狳是唯一依靠重力形成球形铁甲团滚动的动物.Cats are creatures of habit — they seem to appreciate a settled routine...猫是一种有固定习性的动物，它们似乎喜欢过一种有规律的生活。creatures...
The runway is clear — go ahead and land...跑道畅通无阻，开始着陆吧。Finally the son of a bitch walked out of one of the buildings near the runway there.那混蛋终于从跑道附近的一幢房子里走了出来。The pilot taxied the plane to the end of the runway.飞行员将飞机滑行...