经过试验的

The system has been used for three years. The accuracy of B grade submersible pumps coincides with the testing standard.

该系统经过3年多的运行表明，试验精度可达B级试验台的要求。

After countless experiments and years reading about electromagnetic fields, I slowly developed a series of 6 new circuits which I added to the original Lakhovsky circuit.

经过无数次试验和多年阅读有关电磁场，我慢慢地制订了一系列6个新的电路，我说原来的Lakhovsky电路。

The research results showed that the alcoholicity of derivative sugar from hemicellulose would be 40g/L (over 90％ of the theoretical output)after 48 hours′ fermentation with addition of some nutritional component.

试验研究表明，半纤维素衍生糖补充一定的营养成分，经过48h发酵，乙醇浓度可达40g/L，是理论产率的90％以上。

After years of experimentation at vast public expense, the Anglo-French designers had crafted an engineering wonder with little hope of ever turning a profit .

经过几年耗费巨额国有资金的试验之后，英法设计师们炮制出了一个几乎无望获得赢利的工程奇迹。

The concentration of sodium bichromate (Na2Cr2O7) in the reaction of synthesizing yellow chrome need not to be as high as 150~250gL-1, which is asserted by predecessors.

本试验中使用的淋滤液 NdiCtZO7浓度最低可达到 589·L＼因此，一些浓度较高的铬渣淋滤液可不必经过浓缩而直接作反应物制取铬黄。

"Breadboard" test, a more formalized prototype, called the XAF, was installed on the battleship U.S.S.

经过对这架"试验电路"的测试，一种更正式的原型雷达XAF于1938年安装在U.S.S。

Following the "breadboard" test, a more formalized prototype, called the XAF, was installed on the battleship U.S.S.

经过对这架"试验电路"的测试，一种更正式的原型雷达XAF于1938年安装在U.S.S。

It is seen from grafting Aphid test that green peach aphid can feed on green cabbage,spinach and lettuce,and reproduce on them,furthermore,it shows the different viability between on the tested hosts.

通过接种试验看出，桃蚜接种在青菜、菠菜、莴苣等蔬菜上均能取食繁殖，而且相互间可以接种，桃蚜接种在青菜上繁殖生长最快，萝卜蚜和桃蚜接种在番茄上则不能生活，青菜上的萝卜蚜和桃蚜接种在烟草上，其结果萝卜蚜不能生活，而桃蚜经过短期适应取食后，仍可生长、繁殖，为害烟草。

In this paper, adopted the method of microorganism pour plate, 28 strains of filiform fungi were isolated from edible fungi waste of our school .Kaolinite suspension was flocculated by the culture broth ,which was regarded as the index to determine flocculating activity and ability to produce flocculant. 10 flocculant-producing strains which had higher flocculating activity were obtained and they were further rescreened.

以发酵液对高岭土悬浮液絮凝效果为指标衡量其絮凝活性及产絮凝剂能力，经过初筛从分离株中筛选出10株具有较高活性的絮凝剂产生菌，并对这10株菌株进一步作复筛试验，最终选出其中一株絮凝剂高产菌暂时定名F_

The high speed that passes 4 months exp......

经过4个月的高速试验，轴承运转。。。。。。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。