Preconditioned con- jugate gradient algorithm is a fast and accurate computational algorithm.

预条件共轭梯度法是一种精确并且收敛迅速计算方法。

An aged man can not walk very fast.

上了年纪人, 不能走得。

The man lashed the donkey but it would not go any faster.

这人用鞭子抽驴，可是它再也跑不了。

Downward movement is much faster than upward one.

向下移动比向上移动得多。

The sands of his life are fast running out.

他寿命将尽。

The car tires screeched on the road as it turned too fast.

当小汽车转弯太时，轮胎在路上发出尖锐刺耳声音。

He was going too fast and rammed into the car in front.

他速度太，猛地撞上了前面车。

He panicked and ran as fast as he could to safety.

他惊慌，赶跑到安全地方。

The Romanian rowers pulled ahead with fast, powerful strokes.

罗马尼亚划浆手以速有力划水占据了领先位置。

I had to walk very fast to overtake you.

我不得不走才能赶过你。

Metropolitan residents are used to fast rhythm.

大都市居民习惯于节奏。

He's a nice lad, and is fast on the draw.

他是个不错小伙子, 而且头脑也灵活。

He has a mania for (driving) fast cars.

她有开车癖好。

By midnight, the snow was falling thick and fast.

午夜时分，雪下大了。

He must be a lunatic to drive his car so fast.

他把车开这么一定是疯了。

The boat was locked fast in ice.

这条船被冰封了。

Drive faster — the police car is gaining on us.

开点，警车追上我们了。

The police examined the skid marks to see how fast the car had been travelling.

警察检查了车轮滑行痕迹，以判断汽车当时开得有多。

I wasn't sure how fast to go.

我不确定有多远。

A whirlpool is formed by water going round very fast.

漩涡是由不断速旋转水形成。