produce flame

How and where man learnt how to produce flame at will is unknown.

人类是如何并且从哪儿学到怎样去生产火焰当将来是未知的。

The applications include to produce reactive flame retardant, 2-carboxethyl ( phenyl) phosphinic acid ( CEPPA) used for PET fibre and the catalyst for special reaction and agricultural drug.

BPD可用于制备苯基膦酰二氯等中间体、聚酯纤维的反应型阻燃剂2-羧乙基（苯基）次膦酸（CEPPA）、特殊反应的催化剂和对阔叶杂草有很好选择性的农药。

More hands produce a stronger flame. Let's build our gardon with our own hands!

众人拾柴火焰高。让我们用我们自己的双手建设我们的家园！

The fuel used does not produce a flame in a vacuum.

这种燃料在真空中不会产生火花。