The loud crack of thunder echoed through the valley as the storm approached.

当风暴逼近时，巨大的雷鸣声山谷中回荡。

The approaching tornado struck awe in our hearts.

逼近的龙卷风使我们惊万分。

The police are closing in on the criminals.

警察逼近那罪犯。

The enemy is closing in on the city.

敌军逼近这座城市。

Consternation spread throughout the city as the invading army approached.

当侵略军逼近时延了整个城市。

They all evacuated when the enemy approached the city.

敌人逼近这个城市时他们已撤退了。

With the local elections looming large, the Conservative party is beginning to look nervous.

随着地方选举的逼近，保守党开始显得焦躁不安。

The matron bore down upon the terrified nurses.

护士长逼近了那惊的护士们。

The police are moving in on the criminals hiding in the hills.

警察向躲山里的罪犯逼近。

War was impending over the young republic.

战争逼近这个年轻的共和国。

The mad man came at us with a knife.

那个疯子拿着一把刀朝我们逼近。

The police car was gaining ground on the robbers.

警逼近抢劫犯。

The enemy warship tried to bear down on our small airboat.

敌舰企图逼近我们的小汽艇。

He was faced with imminent death.

他面临逼近的死亡。

The crisis is critical for Titanis. As the wolves close in, its attention turns to escape.

这场危机对鸟来说非常关键。随着狼群的逼近，其注意力开始转向逃跑。

Non-uniform rational B-splines (NURBS) was used to fit component characteristics of aerothermodynamic model for approaching turbine engine.

摘要为了使气动热力模型更好的逼近涡轮发动机，应用成熟的非均匀B样条来拟合部件特性。

Some properties of polynomial mollifier are presented and the conclusion that polynomial can consistently approximate continuous function is proved.

给出多项式软化子的几个性质，并由此证得用多项式一致逼近连续函数的结论。

The enemy was upon us.

敌人逼近我们。

A class of nonconforming finite elements are applied to hyperbolic equation with semidiscretization on anisotropic meshes, the optimal error estimates are derived.

摘要各向异性条件下，讨论了双曲型方程的一类非协调有限元逼近，给出了半离散格式下的最优误差佑计。

The trackability limitation of current gradient algorithm is discussed.A new algorithm, named variable parameter gradient estimation algorithm with local polynomial approximation is proposed.

本文分析了梯度辨识算法跟踪时变系统的缺点，提出了一种新的基于局部多项式逼近的变参数梯度估计算法。