Its nationals may be prevented from leaving the country.

其国民可能会被禁止出境

Keep warm. Prevent from cold.

注意保暖，避免受凉。

Lock or unlock your phone to prevent from unwanted checks.

锁定或解锁手机，以防止不必要的检查。

That's because the particles differ in the amount of solar energy that they prevent from reaching the ground.

这是因为硫化物颗粒和煤烟颗粒在遮挡太阳能到达地面的数量不一样。

From this perspective of relative rather than absolute supremacy, a superpower's strength lies as much in what it can prevent from happening as in what it can achieve.

从相对霸权而非绝对霸权的角度看，一个超级大国能阻止什么发生的力量同取得成绩的力量一样大，另一方面同样也在于它能阻止什么。

He said this would prevent companies from creating new jobs.

他说这将阻止各公司创造新的职位。