他注意到带有细菌的一种特殊的透明的果冻上长起了霉。
He noted that mould had grown on a special transparent jelly that had bacteria on it.
典型的噬菌体有存储它们病毒DNA的空心头部和带有尖端的隧道式尾巴，此尖端表面有它们的目标细菌的分子。
Typical phages have hollow heads that store their viral DNA and tunnel tails with tips that bind to specific molecules on the surface of their target bacteria.
研究人员发现当把头发放在自然带有黄金而又没有细菌的土壤中培养时，它的金子的含量不会达到任何有统计学意义的水平。
The researchers found gold levels did not increase in the hair to any statistically significant degree when it was incubated without the microbes in naturally gold-laden soils.
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