Private, First Class Seaman, First Class Airman, First Class：上等兵

牐犗率 Corporal Petty Officer, Third Class Corporal | 牐犐系缺 Private, First Class Seaman, First Class Airman, First Class | 牐犃斜 Private Seaman, Second Class Airman, Second Class

首先 first and last先后：first and foremost

far and near遠近 | first and foremost首先 first and last先后 | free and easy輕松自在

FIRST OFF testing checklist：接受First off測試檢查單

接受部件測試檢查單 component testing checklist | 接受First off測試檢查單 FIRST OFF testing checklist | First off測試計劃 Fist Off testing plan

接受First off測試檢查單：FIRST OFF testing checklist

接受部件測試檢查單 component testing checklist | 接受First off測試檢查單 FIRST OFF testing checklist | First off測試計劃 Fist Off testing plan

First thing first：當務(wù)之急

First come, first served. 先到先得. | First thing first. 當務(wù)之急. | five features 五官

Well, first things first：沒錯,重要的事情先做

Now all we have to do is actually get a car.|現(xiàn)在我們要做的就是弄輛車 | Well, first things first.|沒錯,重要的事情先做 | First things first.|重要的事情先做

first-class quality：或 first-rate quality 頭等的質(zhì)量

transferee 受讓者 | first-class quality 或 first-rate quality 頭等的質(zhì)量 | above the average quality 一般水平以上的質(zhì)量

first-class quality：或 first-rate quality 頭等的品質(zhì)

superior quality 優(yōu)等的品質(zhì) | first-class quality 或 first-rate quality 頭等的品質(zhì) | above the average quality 一般水準以上的品質(zhì)

first-generation operation：第一代維和行動;傳統(tǒng)維和行動

first observed;首次觀測到;FO; | first-generation operation;第一代維和行動;傳統(tǒng)維和行動; ; | first-in, first-out basis; first-in, first-out;先進先出(原則);FIFO;

first-line maintenance：一線保養(yǎng)

first-in, first-out basis; first-in, first-out;先進先出(原則);FIFO; | first-line maintenance;一線保養(yǎng); ; | first-line scale of ammunition;初次彈藥發(fā)放; ;