一种

Hydrogen is a very light gas that can help balloons fly high in the sky.

氢气是常轻的气体，可以帮助气球在天空中飞得很高。

The dark matter in the universe remains a mysterious substance.

宇宙中的暗物质仍然是神秘的物质。

Silicon is a semiconductor used in making computer chips.

硅是半导体，用于制造电脑芯片。

The light grey sky was a very neutral color before the rain.

下雨前，浅灰色的天空是常中性的颜色。

The sky appeared a very neutral color before the rain.

下雨前，天空呈现常中性的颜色。

This is a new adsorption phenomenon showing the complexity of murexide adsorption.

这是的吸附现象,表明了紫脲酸铵吸附过程的复杂性,对其机理行了讨.

There was a strong feeling of fellowship amongst the members of the team.

那个队各个队员之间有强烈的队友情谊。

Any of several related plants, especially those of the genera Amorpha or Baptisia.

紫穗槐属的任何植物，具有奇数羽状叶和紫色穗状花。

Conclusion Mepivacaine is an effective, safe and reliable anesthetic agent for dentistry and oral surgery.

结甲哌卡因是安全可靠、麻醉效果好的口腔用局部麻醉剂。

We imagine using an anticatalyst to "freeze out" any chemical reactions in the system.

可想象利用反催化剂使体系内的任意化学反应“冻结”。

A peculiar austerity marked his judgments of modern life.

他对现代生活的批评带着特殊的苛刻。

Cutting-rubbing mill is advanced new model special equipment for aciform wollastonite.

剪搓磨是先、生产针状硅灰石粉的专用设备。

L-canavanine, the analog of L-arginine ,is a natural non-protein amino acid.

刀豆氨酸是天然的蛋白质氨基酸,L-精氨酸的类似物。

The woods have an aura of mystery.

林子里有神秘的气氛。

The opera was an aural as well as a visual delight.

这部歌剧对于听觉和视觉都是享受。

The author's style is spare and elegant.

这个作者有不加渲染的优雅风格。

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

预条件共轭梯度法是精确并且收敛迅速的计算方法。

Amplifier is electrical device which make sounds louder.

扩音器是使声音放大的电气装置。

It's a stigma to ask for money.

要钱是耻辱。

Ketohexose A ketose SUGAR with six carbon atoms, e.g. fructose.

六碳的酮糖。例如果糖。