birds and their earthbound predators鸟和地面上捕食它们的动物The earthbound larvae from which they develop are less pretty, but just as predatory.幼虫生活在地面上，不像成虫后那么美丽，但是同样会捕食。He practised the art of earthbound realism.他实践生根于土壤的现实主义艺术....
由此你可以算出银河系的总质量。From this you can calculate the total mass in the Galaxy.银河系由1,000亿颗恒星组成。The Galaxy consists of 100 billion stars.地球是银河系中的星球之一.The earth is one of the planets in the Galaxy....