The evergreen forests of the Amazon and Congo basins, for example, are generally fire-free because the closed canopy maintains a level of humidity that inhibits burning.

例如，亚马逊和刚果盆地的乔木通常是防火的，因为它们遮天的树冠保持了一定的湿度，抑制了燃烧。

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Free radicals are produced mainly by the body burning oxygen, partly as a result of smoking, pollution and sunlight.

游离基主要是在身体消耗氧气时产生，部分是因吸烟、污染和日照所致。

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Determining the iron content in organism by oxygen bomb burning incineration is easy to operate, fast to finish, free of pollution and reliable in different conditions.

用氧弹燃烧灰化法对有机物中铁的含量进行测定，方法操作简便、快速，实验过程无污染，测定结果可靠。

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"Desire" is blessedly free of the burning deserts and first-person fantasies of manipulative or murderous mothers that made listening to "To Bring You My Love" feel like a vicarious psychological collapse.

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Dr Alamaro wants to use a gas-burning, rather than a coal- or oil-burning plant, because the exhaust produced by burning natural gas is free from sulphur dioxide, which plants hate.

ECONOMIST: Horticulture

Marine Corps Staff Sergeant Keith Kesterson. (Applause.) He rushed through enemy fire to free a fellow Marine trapped inside a burning vehicle.

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