The global topological structure of the biquadratic systems is discussed and their coefficient conditions are given.

That leads to biquadratic equations for solution.

它们又引出待解的双二次方程.

Using UV-CUT crystal quartz glass, the HID xenon light can keep crystal forever!

HID灯使用UV-cut抗紫外线石英玻璃, 永保车灯晶莹剔透.

Quartz glass commonly used in the manufacture of high-temperature chemical equipment.

石英玻璃常用于制造耐高温的化学仪器.

Unpackaged devices are loosely covered with plastic film. Ventilation must be maintained for corrosion protection.

未包装的开关柜,用塑料薄膜松散地遮盖以免弄脏. 必须保持空气流通以防腐蚀.

The stuffing box is machined relative to the seat minimizing seat and external leakage simultaneously.

填料函是相对于阀座的机械装置,能够最大限度减少阀座和外部同时出现泄漏.

Stuffing Box ? optional lantern rings and grease injectors are available.

填料函-可配置备选灯笼环和润滑油注射器.

The water gurgled into the paddy field.

水汩汩地流入稻田.

The paddy field becomes the sea of love and joy.

顿时,晒谷场上成了爱的热爱、欢乐的海洋.

Anumbers of Fairy shrimp swam around in the paddy field.

好多的湖沼枝额虫在水田里游泳.

A great numbers of Fairy shrimp swam around in the paddy field.

很多的湖沼枝额虫在水田里游泳.

As spring is approaching, the paddy field is full of grain seedling.

春天到了, 稻田里种满了禾苗.

Old holy Joe wants to see all of us at services.

老牧师要我们大家都去参加礼拜.

You should pal up with John. He's the man to help you.

你应该和约翰交朋友, 他可以给你帮助.

You should pal up with him.

你应该和他交朋友.

The policy's unpalatability caused an uproar.

那项令人不满的政令导致了一场骚乱.

What you said were just empty words.

你所说的,不过是浮词虚语罢了.

What he said were all empty words. You shouldn't take them seriously.

他说都是虚言, 你不要太当真了.

Don't speak empty words.

不要说空话.

She was smiling wanly.

她苍白无力地笑着.

This makes lithofacies palaeogeography map and lithofacies palaeogeography develop into the quantitative stage.

这就使岩相古地理图和岩相古地理学发展到了定量的阶段.