如果运行时间超过四秒钟要使用进度条。
Use progress bars when operations take more than four seconds.
两秒钟,三秒钟,四秒钟
一个操作最多四秒钟。
在三或者四秒钟内，我的猜测是你会在拼命的呼吸。
Within three or four seconds, my guess is that you would be breathing like hell.
在那次武器评估演习中，这名飞行员扮演敌方侦察兵的角色，受到最大功率灼伤，持续时间四秒钟。
He was playing the role of an enemy scout during an exercise that was meant to evaluate the weapon, and got blasted at full power for four seconds.
有十亿多的人口喝不到干净的水，有上亿人口长期处于饥饿状态，每四秒钟就有一个五岁以下儿童死于极度贫困。
More than a billion don't have clean water to drink, while hundreds of millions are chronically hungry. And every four seconds a child under age 5 dies because of extreme poverty.
有十亿多的人口喝不到干净的水，有上亿人口长期处于饥饿状态，每四秒钟就有一个五岁以下儿童死于极度贫困。
More than a billion don't have clean water to drink, while hundreds of millions are chronically hungry. And every four seconds a child under age 5 dies because of extreme poverty.
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