They're spraying DDT. to kill the insects.

DDT molecules in water tend to migrate to the surface.

在水中滴滴涕分子趋向于向水面移动.

Take DDT, a pesticide that can damage the nerous system.

如DDT, 一种可损伤神经系统的杀虫剂.

Encouraged the use of DDT indoors, but discouraged it for outdoor use.

鼓励在室内使用DDT, 但不鼓励在户外使用.

Many insects have became resistant to DDT.

很多昆虫对DDT都有了抵抗力.

Thousands of new chemicals , like DDT, soon resided in every living tissue.

DDT等无数新的化学品, 很快渗进了每个活组织.

Many microorganisms possess the ability to dehydrohalogenate DDT to DDE.

许多微生物使滴滴涕脱卤化氢变为滴滴依.

Then came the golden days of DDT ( dichlorodiphenyltrichloroethane ).

然后就是 DDT 的黄金年代.

Technical Documentation fee is for delivery DDU Destination Airport.

其技术资料价格为ddu目的地机场交付价.

The DDU term was added in the 1990 version of Incoterms.

此到指定目的地税前交货价(DDU)条件被加入于1990年版国贸条规中.

Fewer workers are needed to solder circuit boards.

焊接电路板需要的工人更少了。

Adjustable temperature from 150 ℃ to 300 ℃, warm-up circuit boards easier.

可调节温度从150℃到300℃, 预热电路板更得心应手.

Sumith 1 : 400 ; and DDVP 1 : 400 spraying are very effective.

杀螟松 1∶400 倍水和DDVP1∶400 倍水喷洒植株,药效均达90%以上.

PRODUCT USE: Flexible printed circuit Boards.

用途: 用于挠性印制电路板.

Meanwhile, V _ ( max ) values were approximately four times as high for DDVP-R compared with the susceptible strain.

同时, DDVP -R 品系中V_ ( max ) 大约是敏感品系的4倍,说明该抗性品系中GSTs对GSH的 亲和力虽然下降,但是其可以通过V_(max)的提高来弥补亲和力下降所造成的损失.

The results show that H 2 O 2 and K 2 S 2 O 8 can photodegradate DDVP betterly.

结果表明:H2O2、K2S2O8对DDVP的光降解具有良好的效果.

Applied to hardware tools, electronics, circuit boards , stationery, toys, etc. fitted packaging.

适用于五金工具 、 电子 、 线路板 、 玩具文具等的贴体包装.

Products to Circuit boards, logic system, hydraulic parts, mainly hydraulic unit.

产品以油路板 、 逻辑系统 、 液压件 、 油压单元为主.

Influences of pH, concentrations of oxidents and Cu 2 + on the photodegradation rate of DDVP were investigated.

探讨了氧化剂浓度、pH值 、 Cu2+浓度对DDVP光降解的影响.

Second , UV drying equipment: general-UV-light aircraft , circuit boards UV-light aircraft, offset UV curing machine, Binghua machines.

UV干燥设备: 普通型UV光固机 、 线路板UV光固机 、 胶印UV固化机 、 冰花机等.

The results showed that 14 % Imidacloprid + DDVP , 4.5 % Imidacloprid and 30 % DDVP + omethoate were efficient, and 14 % Imidacloprid + DDVP exhibits high efficiency.

结果表明14%吡虫啉.敌敌畏注干液剂 、 4.5%吡虫啉注干液剂和30%敌畏.