base line 是什么意思

	1.	The base line can be set out as a single or double chain . 基线可作为一条单链系或双链系。
	2.	It will be a base line for future bird studies all over the world . 这将是未来全世界研究鸟类的一个基准。
	3.	Ross lays a sacrifice bunt up the first - base line , 罗斯用了牺牲短打往一垒方向击出
	4.	Application of mile issue in design of hydrological base line 米勒问题在水文基线设计中的应用
	5.	The rule of law as the base line of socialism 法治是社会主义的底线
	6.	Transverse metacenter above the base line 船舶横稳心距基线高度
	7.	Transverse metacenter height above base line 横稳心距基线高度
	8.	The escapement vector is parallel to the base line of a row of text 行距向量与文本行的基线平行。
	9.	The zero - based line number in which the character index is located 字符索引所在的从零开始的行号。
	10.	Electric engineering bidding base line evaluation and bidding techniques 电力工程标底评价与报价技巧

base line是什么意思