The police are closing in on the criminals.

警察正逼近那些罪犯。

The enemy is closing in on the city.

敌军正逼近这座城。

The police car was gaining ground on the robbers.

警车正在逼近抢劫犯。

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

敌舰企图逼近我们小汽艇。

War was impending over the young republic.

战争正在逼近这个年轻共和国。

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 are moving in on the criminals hiding in the hills.

警察正向躲在山里罪犯逼近。

They all evacuated when the enemy approached the city.

敌人逼近这个城们已撤退了。

The matron bore down upon the terrified nurses.

护士长逼近了那些惊护士们。

Consternation spread throughout the city as the invading army approached.

当侵略军逼近恐蔓延了整个城。

The approaching tornado struck awe in our hearts.

正在逼近龙卷风使我们惊恐万分。

He was faced with imminent death.

面临逼近。

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

随着地方选举逼近，保守党开始显得焦躁不安。

The enemy was upon us.

敌人逼近我们。

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

这场危机对恐鸟来说非常关键。随着狼群逼近，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逼近涡轮发动机，应用成熟非均匀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.

给出多项式软化子几个性质，并由此证得用多项式一致逼近连续函数结论。

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

摘要在各向异性条件下，讨论了双曲型方程一类非协调有限元逼近，给出了半离散格式下最优误差佑计。

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变系统缺点，提出了一种新基于局部多项式逼近变参数梯度估计算法。

For the other four leaf shapes - spathulate, denta-spathulate, cello-shaped and deltoid - more segments of Bezier curves were necessary for a good fitting.

对于三角形、匙形、齿匙形、提琴形等四种叶形来说，其误差较大，这些类型叶片宜以多段贝氏曲线进行几何模拟，以准确地逼近实际叶片形状。