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First and foremost they needed food：食物是他们最需要的东西

13. first and foremost首先, 第一;最重要的 | First and foremost they needed food. 食物是他们最需要的东西. | I want you to remember to pay that bill first and foremost.首先我要你记得付账.

or your first and last：对你来说是很多个的第一个 还是第一个和最后一个

- I can't. - Okay. Tell me this.|- 我做不到 - 好... | Is Katy just your first, your first of many, or your first and last?|Katy对你来说是很多个的第一个 还是第一个和最后一个? | How should I know?|我怎么...

首先 first and last先后：first and foremost

far and near远近 | first and foremost首先 first and last先后 | free and easy轻松自在

first motion approximation：初动近似

初动 first motion, first movement | 初动近似 first motion approximation | 广义射线 generalized ray

first axiom of countability：第一可数性公理

first approximation 首次近似 | first axiom of countability 第一可数性公理 | first boundary condition 狄利克雷边界条件

first base：一垒的位置

first and foremost 首先 | first base 一垒的位置 | first baseman 一垒手

first base man：一垒手

first base一垒 | first base man一垒手 | first batter首位击球员

first base man：一垒员

first base man 一壘員 | first half 前半時 | first line center 前排中

first boundary condition：狄利克雷边界条件

first axiom of countability 第一可数性公理 | first boundary condition 狄利克雷边界条件 | first boundary value problem 狄利克雷问题

first boundary value problem：狄利克雷问题

first boundary condition 狄利克雷边界条件 | first boundary value problem 狄利克雷问题 | first class 第一类

grating spectral order：光栅光谱级

grating spacing 栅线间距 | grating spectral order 光栅光谱级 | grating spectrograph 光栅摄谱仪

Butler：仆役长

小说讲述的,是发生在英国牛津郡一所大庄园中的故事,主人公,是庄园的仆役长(butler)斯蒂文(butler是英国特有之人物,是贵族之家的地位最高的男仆人,译作"仆役长"并不很达意).