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first-generation operation：第一代维和行动;传统维和行动

first observed;首次观测到;FO; | first-generation operation;第一代维和行动;传统维和行动; ; | first-in, first-out basis; first-in, first-out;先进先出(原则);FIFO;

first-line maintenance：一线保养

first-in, first-out basis; first-in, first-out;先进先出(原则);FIFO; | first-line maintenance;一线保养; ; | first-line scale of ammunition;初次弹药发放; ;

First thing first：当务之急

First come, first served. 先到先得. | First thing first. 当务之急. | five features 五官

Well, first things first：没错,重要的事情先做

Now all we have to do is actually get a car.|现在我们要做的就是弄辆车 | Well, first things first.|没错,重要的事情先做 | First things first.|重要的事情先做

So first things first：所以事不宜迟

good day日安(白天见面或分手时之招呼),可表示"你好",亦可表示"再见". | 17. So first things first. 所以事不宜迟. | first things first 重要的事情先来,须急当务之急

first-degree discrimination：一级差别待遇

first-come-first-served 先着優先 | first-degree discrimination 一级差别待遇 | first-fit method 首次满足法

first-degree price discrimination：第一級差別取價

First World 第一世界 | first-degree price discrimination 第一级差别取价 | First-in-first-out (FIFO) 先进先出原则

First-generation space：從未承租過的房地產

First refusal right, or right of first refusal:先購權 | First-generation space:從未承租過的房地產 | First-loss position:第一個損失的債權人

First-generation space：從侮J凶膺^的房地產

First refusal right, or right of first refusal:先購權 | First-generation space:從侮J凶膺^的房地產 | First-loss position:第壹個損失的債檱喫

first-generation microcomputers：第一代微计算机

first-generation computer 第一代计算机 | first-generation microcomputers 第一代微计算机 | First-In ,First-Out 先进先出 FIFO

the bird of wonder：凤凰;长生鸟

the bird of peace鸽子 | the bird of prey 猛禽 | the bird of wonder凤凰;长生鸟

flange rail：平底轨条

"凸缘皮带轮","flange pulley" | "平底轨条","flange rail" | "凸缘肋","flange rib"