first speed gear [机] 头档齿轮 ; 一速齿轮
first speed 初速 ; 一速
first speed range 一速范围
first speed clutch 一速离合器
first speed forward 前进一速
first speed sliding gear 一速滑移齿轮
first speed clutch group 一速离合器组件
first speed planet gear bearing 一速行星齿轮轴承
First through a low velocity core, and then through a high velocity shell, where their speed is increased before they are transmitted into the surrounding seawater.
它们首先通过一个低速的核心，然后通过一个高速的外壳，在它们被输送进周围的海水之前，它们的速度提高了。
He was one of the first people to use high speed flash in bird photography.
他是鸟类摄影中最先使用高速闪光灯的人之一。
The first country to have a high speed train is Japan.
第一个拥有高铁的国家是日本。
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