A South American bird that forages for winged termites and other small insects while swinging upside down form the foliage of tall trees.
一种南美洲的鸟，倒挂在高大的树上，觅食有翼的白蚁和其他小昆虫。
A Tokay gecko hangs upside down in its terrarium at the Academy of Natural Sciences in Philadelphia, Pennsylvania.
宾夕法尼亚州费城自然科学院的养缸里，一只壁虎倒挂着。
They're lenses because they're convex vessels, and when they're full of water, they act as a lens and you see the horizon in them, upside down and backwards.
它们是透镜，因为它们是凸面容器，当它们盛满水后，它们可作为透镜使用，你可以看到它们里面上下颠倒的地平线。
应用推荐