The police are closing in on the criminals.

警察正那些罪犯。

The enemy is closing in on the city.

敌军正这座城市。

The police car was gaining ground on the robbers.

警车正抢劫犯。

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

敌舰企图我的小汽艇。

War was impending over the young republic.

战争正这个年轻的共和国。

The mad man came at us with a knife.

那个疯子拿着一把刀朝我。

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

警察正向躲山里的罪犯。

They all evacuated when the enemy approached the city.

敌人这个城市时他已撤退了。

The matron bore down upon the terrified nurses.

长了那些惊的。

Consternation spread throughout the city as the invading army approached.

当侵略军时恐蔓延了整个城市。

The approaching tornado struck awe in our hearts.

正的龙卷风使我惊恐万分。

He was faced with imminent death.

他面临的死亡。

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

随着地方选举的，保守党开始显得焦躁不安。

The enemy was upon us.

敌人我。

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。随着狼群的，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连续函数的结论。

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

摘要各向异性条件下，讨论了双曲型方程的一类非协调有限元，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的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，这些类型的叶片宜以多段的贝氏曲线进行几何模拟，以准确地实际的叶片形状。