查询词典 helium

Helium and argon are monatomic gases.

氦和氩都是单原子气体。

Helium is a unique, multipurpose molecule—but it is a finite resource and global demand for it is growing.

氦气是一种独特的，多用途的气体——但它的资源储量有限而全球对其的需求却不断增长。

The results show that the atmosphere has a big influence on the thermal stability of C_(60).C_(60) begins to decompose at 423.5℃in the air,the deomposed peak temperature is 668.5℃,but very stable in the helium atmosphere,only sublimate,the crystal shape of C_(60) has a certain influence to its thermal stability.The synthesized nine kinds of nitro-fullerene derivatives all have good thermal stability and their decomposed peak temperatures all exceed 350℃.The thermal explosion temperature for 5 seconds delay of product 4 is 253℃.The category,number and position of nitryl group in nitro-fullerene derivatives all have influence on their thermal stability.

利用差热分析仪和DSC-TG综合热分析仪对C_(60)及其硝基衍生物的热稳定性进行了研究，结果表明，环境气氛对C_(60)热稳定性影响很大，C_(60)在空气中423.5℃开始分解，放热峰值温度为668.5℃，在氦气中很稳定，仅表现为升华，C_(60)的晶型对其热稳定性也有一定的影响；合成得到的九种硝基富勒烯衍生物都具有较好的热稳定性，分解峰值温度均高于350℃；产物4的5秒爆发点测试结果为253℃。

A noble gas such as helium or neon; noble metals include gold and silver and platinum .

惰性气体，如氦和氖；贵重金属包括金、银和铂。

Liquid helium is inert, colorless, odorless, noncorrosive, extremely cold, and nonflammable.

液态氦不活泼，无色，无嗅，无腐蚀性，温度极低，不可燃。

General概述 Liquid helium is inert, colorless, odorless, noncorrosive, extremely cold, and nonflammable.

液态氦不活泼，无色，无嗅，无腐蚀性，温度极低，不可燃。

Since helium is nonflammable, special fire fighting equipment and instructions are not needed.

由于氦不可燃，不需要特殊的救火设备和指导。

Being both lighter than air and nonflammable, helium is used to inflate balloons and airship s.

由于既比空气轻又不可燃，氦用作充气球和飞艇。

Hydrogen was formerly used to fill airship s; nonflammable helium has replaced it.

氢过去用于填充飞船；无味的氦已取代它。

Being both lighter than air and nonflammable, helium is used to inflate balloon s and airships.

由于既比空气轻又不可燃，氦用作充气球和飞艇。

By using competitive adsorption of activated carbom to remove unfavorable influence of carbon in carbonaceous gold concentrate on leaching process, the leaching rate of gold concentrate can be improved to 88% as compared with 10%by direct cyanidation.

本文论述了利用活性炭竞争吸附作用，消除含炭金精矿中炭在浸出过程中的影响，使金精矿的浸出率可由直接氰化的10％提高到88％。

The only thing you're ever gonna be king of is King of the Stupids!

你只配做傻瓜的国王！