1.The dissolved oxygen had greater effects on heterotrophic bacteria,ammonifying bacteria and nitrifying bacteria.

1.溶解氧对异养、氨化、硝化有较影响。

2.The photosynthetic pigment in bacteria is bacteriochlorophyll.

2.光合作用色素是叶绿素。

3.The quorum sensing commonly exists in procaryote kingdom, regulating various biologic functions.

3.群感应现象在中普遍存在，参与多种生理功能调控。

4.The microorgan-isms employed include mainly chemical conversion bacteria,phototropic bacteria and alga.

4.所利用生物主要包括：化学转化、向光和藻类。

5.Bacteria are invisible to the naked eye.

5.是肉眼看不见。

6.The bacteria get into humans through abrasions in the skin.

6.可以通过擦伤处进入。

7.Brain lesions can be caused by bacterial infections.

7.脑损伤可能由感染引起。

8.The biology of bacteria can be quite hard to understand.

8.生物学有时会很难理解。

9.The bacterium is the bulbiform bacili of negative of coloring of change orchid family name.

9.为革兰氏染色阴球状杆。

10.Bacterial reproduction is accelerated in weightless space.

10.在失重空间,繁殖加快了。

11.The air is full of millions of invisible germs.

11.空气中充满了许多看不见。

12.Wash everything thoroughly to avoid contamination with bacteria.

12.把所有东西都彻底洗净以避免污染。

13.The evidence from bacteriologic analysis was equivocal.

13.这一学分析证据是不明确。

14.Objective To study the effect of photosynthetic bacteria(PSB) on regulation of lipide in serum.

14.目研究光合对血清中脂质调节作用。

15.Bacteria was introduced into his bloodstream through an unsterile needle.

15.通过未消毒针进入了他血流中。

16.Bacteria sticks to food debris in the teeth, causing decay.

16.附着在牙缝中食物残渣上，道致蛀牙。

17.Air-conditioning ducts create a perfect breeding ground for Legionnaire's disease bacteria.

17.空调系统输送管则是军团病绝佳温床。

18.A few Archaea, e.g.Sulfolobus, can oxidize elemental sulfur.

18.少数古，如噬霉素Sulfolobus,可以氧化硫元素。

19.Tomato bacteria diseaes rifely happen abroad which affect production deeplly.

19.番茄病害在国外普遍发生,对生产上威胁较。

20.A microscope magnifies bacteria so that they can be seen and studied.

20.显微镜把放, 使们得以看见并研究它。