The tropics are the parts of the world that lie between two lines of latitude, the tropic of Cancer, 23?° north of the equator, and the tropic of Capricorn, 23?° south of the equator.
双语例句
例： Being in the tropics meant that insects formed a large part of our life.
身处热带地区意味着昆虫在我们的生活中占了很大的一部分。