helium是什么意思 helium在线翻译 helium什么意思 helium的意思 helium的翻译 helium的解释 helium的发音 helium的同义词 helium的反义词 helium的例句

名词<化>氦

1. The helium atoms were locked in the mineral grains as they cooled and moved closer to the surface during the carving of the Grand Canyon.

2. A local company that provided the balloons filled the balloons with highly combustible hydrogen in stead of helium as required.

3. Space officials at mission control said the operation went smoothly, proving that the helium leak posed no threat.

4. Sheriff's deputies secured it to keep it in place, tossing shovelfuls of dirt on one edge and poking holes to let the helium out.

5. The " clouds " are made from a lightweight carbon structure and carry a giant envelope of material containing helium gas.

6. It's the story of a curmudgeonly widower who sets off to South America in a house carried aloft by thousands of helium balloons.

7. Astronomers think this star violently expelled all its hydrogen and nearly all its helium, leaving behind a stellar nucleus with a surface half carbon and half oxygen.

8. The eight newly described ones have atmospheres primarily of carbon, with little or no trace of hydrogen or helium.

9. The balloons contain helium and oxygen so that they float around with the air currents.

10. His target was a helium balloon, which moved from its original position because of the wind.