早知文理百科

keep后面加safe keep safe 保持安全 例句 He decided to move the ship deeper into the ice to keep safe. 他决定把船开到冰层深处以保证安全。 You may w...

country n. 国家，国土；国民； 例句 He entered the country illegally. 他通过非法途径进入了这个国家。 The country is in ferment. 这个国家动荡不安...