Some studies hinted that a majority of nuclei in snow crystals may be decayed vegetation, bacteria, or fungi spores; and so snow may be largely life-triggered.

某些研究暗示，大多数雪晶的核也许是腐朽的植物、细菌或菌类孢子；因此，也许雪大都是由生命触发的。

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There are two important genera of bacteria which form spores.

形成芽孢的细菌主要有两属。

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C. difficile bacteria are found in the stool of an infected person, and others can become infected if they touch items or surfaces contaminated with the bacteria or spores and then touch their mouths.

难辨梭菌可以在被感染者使用过的器具中发现，人们可以通过接触带有细菌或孢子污染过的器具表面，经口感染。

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Bush noted that investigators erred in the early days of the anthrax threat, believing that spores of the potentially deadly bacteria could not escape a sealed envelope.

CNN: Bush reassures Americans about anthrax

Many species of bacteria have been collected from clouds, along with the spores of a variety of fungi.

ECONOMIST: Aerobiology

For these organisms, getting down from a cloud may be more of an ordeal than getting up: spore-releasing fungi tend to shed spores at the times of day and year when thermals are most likely, and bacteria are so small and light that the slightest puff of wind can send them flying.

ECONOMIST: Aerobiology