combust

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Helium is far lighter than air and is inert, which means it won't combust when you combine it with air and energy, like Hydrogen does (below).
氦气比空气轻得多并且是惰性气体，这意味着，当它与空气和明火接触不会燃烧，而氢气却会（请看下图）。
Such tiny particles combust more rapidly than larger particles to give an additional kick, and may allow easier control over a rocket's thrust.
这样的微小颗粒比大颗粒燃烧的更迅速，从而能提供额外的推进力，并可以更加容易控制火箭的推进。
Without cooling water, the irradiated nuclear fuel could spontaneously combust in an exothermic reaction.
没有冷水，辐照性核燃料就会在放热反应发生的同时燃烧。

The only way to control carbon dioxide emissions is to make a car combust less fuel.
NPR: States Push Automakers on Fuel Efficiency
In June 2006, one of the company's notebook computers appeared to spontaneously combust at a conference in Osaka, Japan.
FORBES: Dell Climbs Out Of Accounting Hell
The Wankel engine in the Mazda RX-8 houses a rapidly spinning cam that is shaped to compress and combust fuel and air against the inside of an oval chamber.
FORBES: How to get 51mpg from an engine the size of a large turkey.

(of a star or planet) invisible for a period between 24 and 30 days each year due to its proximity to the sun 2430
to burn