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- Walcott was the first geologist to identify pre-Cambrian fossil bacteria from microscopic examination of thin rock slices. 沃尔科特是第一个在岩石薄片镜检中鉴定出前寒武纪化石细菌的地质学家。
- But no life has been found on Mars, and the one claim of fossil bacteria in a Martian meteorite, made by NASA scientists in 1996, has been almost universally rejected. 1996年，美国国家太空总署(NASA)科学家声称在火星上的陨石发现细菌的化石；当今科学界普遍的不接授这个证据。
- He found a piece of fossil of an ancient bird. 他发现一块古代鸟类的化石。
- This fossil may be over 2 million years old. 这化石可能超过二百万年了。
- A film of mucus and bacteria on a tooth surface. 齿菌斑牙齿表面一层粘液和细菌的膜
- Can you date the fossil exactly? 你能确定这化石的确切年代吗?
- Bacteria are too small to see with the naked eye. 细菌太小，肉眼看不见。
- Many diseases are caused by bacteria. 许多疾病是由细菌引起的。
- Dissolution or destruction of bacteria. 溶菌作用对细菌的溶解或破坏
- Such a growth or colony, as of bacteria. 培养菌该种生长物或群落，如培养菌
- The presence of bacteria in the blood. 菌血症血液中细菌的存在
- He worked out methods to destroy bacteria on the seeds. 他研究出消灭种子上细菌的方法。
- Isn't Professor Bell an old fossil? 贝尔教授真是个老顽固。
- A microscopic fossil, as of a pollen grain or unicellular organism. 微体化石一种微小的化石，如花粉粒或单细胞有机体的化石
- A bacterium is identified as the cause for his duodenal ulcer. 一种细菌被断定为造成他十二指肠溃疡的根源。
- If we squander our fossil fuels, we threaten civilization. 如果我们浪费矿物燃料，我们就威胁文明。
- Professor Fang worked out a method to destroy bacteria on the seeds. 方教授想出了一个办法来消灭种子上的细菌。
- Observe carefully how the bacteria respond to this stimulus. 仔细观察细菌对这一刺激有什么反应。
- The gossip tossed the mossy blossom fossil. 爱讲闲话者向上抛长满苔藓的花化石。
- Hot weather multiplied the bacteria in the food rapidly. 炎热的天气使食品中的细菌迅速繁殖。
