first base

n. 一垒的位置

同：	[n.] first

The above discussion on first-stage propellant slosh effects is based on the Saturn vehicles, which use kerosene for fuel and LOX for oxidizer
上面对于第一级推进剂晃动影响的讨论，是建立在“收藏
First of all, You have to design the gravimetric network and a base station. Gravimeter observation are usually made at the corner of the square grid.
首先必须设计和布置测网，选择一个测量基点，而这些测网交点便是重力测量的观察点。收藏
We substituted John for Bill at first base.
第一垒我们让约翰代替比尔。收藏
Do either of the first two grounds - based on U.N. Charter provisions - justify war?
前两种情况，即建立在联合国宪章规定的基础上，能够证明伊拉克战争的合法性吗收藏
"Last week he had the honour of being the first asian male singer to make the cover of Time, a popular magazine based in the US."
上周他还有幸成为美国著名《时代》杂志封面的第一位亚洲男歌手。收藏

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the base that must be touched first by a base runner in baseball
the fielding position of the player on a baseball team who is stationed at first of the bases in the infield (counting counterclockwise from home plate)
[同] first, first base

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