氧气

A mere sterilization of the site is not enough, there is a need of oxygen to sustain life.

该网站的一个仅仅绝育是不够的，有需要的氧气维持生命。

It uses a minimum supply of water and produces oxygen instead of toxic gases, which are the by-product of pesticides.

系统采用最低水量，可产生氧气，因而不存在杀虫剂释放有毒气体的问题。

Under the optimal conditions 1.5×10~(-3 mol/L of 22, 1.0 MPa of O_2, 120℃, 20 h, the conversion of ethylbenzene was 37.8%, and the selectivity for acetophenone and 1-phenylethynol was 82.5% and 13.5% respectively.

在22浓度为1.5×10~(-3)mol／L，氧气压力为1.0 MPa，120℃反应20 h，乙苯转化率为37.8％，苯乙酮的选择性为82.5％，1-苯基乙醇的选择性为13.5％，锰配合物23次之。

Under optimal conditions, oxidation of ethylbenzene into acetophenone under 1 atm O2 and 1 mol% NHPI reach to 64% yield.

在最佳的催化状态下，苯乙烷能在1 atm的氧气、1 mol% NHPI与轴向配位基为吡啶的紫质修饰二氧化钛共催化下，氧化成苯乙酮，并得到64%的产率。

I used a oxygen acetylene brazing torch set on the soft side.

我用一氧气乙炔焊炬定于软的一面。

IT is advisable to have not too much of acetylene flame, as otherwise the quality of build-up

致影响到堆焊质量，同时，还会降低融化温度，氧气的工作压力，一般为3～3.5/CM2

Deep-sea vent communities, for instance, are too far down to directly use sunlight but they do use oxygen dissolved in seawater, and that oxygen is produced by photosynthesising plankton at the surface.

深海通风孔位于海底很难获得太阳光的照射，通风孔的生态系统便会充分使用海水中分解的氧气，这些氧气是由水面进行光合作用的浮游生物生成的。

The enzymatic activity of PHDs is O2-dependent so PHDs are believed to be oxygen sensors as well as tumor suppressors.

的降解。由于PHD的酶活性严格受氧气浓度的调节，因而被认为是机体的氧气感受器。

Growing Low-Oxygen Zones in Oceans Worry Scientists [Mar 7] In some spots off Washington state and Oregon, the almost complete absence of oxygen has left piles of Dungeness crab carcasses littering the ocean floor, killed off 25-year-old sea stars, crippled colonies of sea anemones and produced mats of potentially noxious bacteria that thrive in such conditions.

&海洋上不断增长的低氧气区域令科学家们担心&（3月7日）。在沿着华盛顿州和俄勒冈州的某些地方，几乎整个地缺乏氧气，导致成堆的Dungeness螃蟹的尸体散落在海底，使25岁的大的海星死亡，毁坏了海葵生活的群落，产生了大簇在此条件下兴盛的，具有潜在毒性的细菌。

Growing Low-Oxygen Zones in Oceans Worry Scientists [Mar 7] http://news.yahoo.com/s/mcclatchy/20100307/sc_mcclatchy/3444187 In some spots off Washington state and Oregon, the almost complete absence of oxygen has left piles of Dungeness crab carcasses littering the ocean floor, killed off 25-year-old sea stars, crippled colonies of sea anemones and produced mats of potentially noxious bacteria that thrive in such conditions.

&海洋上不断增长的低氧气区域令科学家们担心&（3月7日） http：//news.yahoo.com/s/mcclatchy/20100307/sc_mcclatchy/3444187 。在沿着华盛顿州和俄勒冈州的某些地方，几乎整个地缺乏氧气，导致成堆的Dungeness螃蟹的尸体散落在海底，使25岁的大的海星死亡，毁坏了海葵生活的群落，产生了大簇在此条件下兴盛的，具有潜在毒性的细菌。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。