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Memory boxes for baby's first tooth & first curl：记忆箱婴儿的第一齿与第一卷曲

Silver-plated Bear Fork and Spoon银镀金承担叉和勺子 | Memory boxes for baby's first tooth & first curl.记忆箱婴儿的第一齿与第一卷曲. | Editorial Review: 编辑审查:

first breaker card：头道梳毛机

first break time 初至时间 | first breaker card 头道梳毛机 | first category gassy mine 一级瓦斯煤矿

first cameraman：首席摄影师

first assistant photographer (剧照)第一助理摄影师 | first cameraman 首席摄影师 | first company grip 置景工

First Day in the Children's Center：幼儿园第一天

幼儿园第一天 First Day in the Children's Center(2009-09-29 09:18:59) | First Day in the Children's Center 幼儿园第一天 | It's my first day 今天第一次去幼儿园教中文,

first comparison test：第一比较检验

first class 第一类 | first comparison test 第一比较检验 | first derivative 一阶导数

complete elliptic integral of the first kind：第一类完全椭圆积分

第一类椭圆积分|elliptic integral of the first kind | 第一类完全椭圆积分|complete elliptic integral of the first kind | 第一类沃尔泰拉积分方程|Volterra integral equation of the first kind

first countability axiom：第一可数性公理

前件 first component | 第一可数性公理 first countability axiom | 第一曲率 first curvature

first critical angle：第一临界角

first cost 初次费用 | first critical angle 第一临界角 | first derivative 一阶导数

first curvature vector：第一曲率向量

第一曲率 first curvature | 第一曲率向量 first curvature vector | 一阶求导;一阶求微 first derivation

First derivative：一阶导数Btu中国学习动力网

first approximation 首近似值Btu中国学习动力网 | first derivative 一阶导数Btu中国学习动力网 | first order differential equation 一阶微分方程Btu中国学习动力网

of a composite function：复合函数之导数

Derivative :导数 | of a composite function :复合函数之导数 | of a constant function :常数函数之导数

enriched lake：富营养湖

LRPA Long-Range Patrol Aircraft 远程巡逻飞机 | enriched lake 富营养湖 | bang it about 决胜负 诉诸武力