grade的例句

grade 的相关例句:

61.	grade up
	升级;通过与良种杂交改良
62.	gun a car up a steep grade
	开足马力把汽车驶上陡坡
63.	be promoted to the next grade
	升高一级
64.	a grade school
	（美）八年制的小学
65.	a warrant officer, Junior Grade
	（美）海军[海军陆战队]二级准尉