Beware how you handle this dangerous substance.

注意你处理这种危险品的方法。

This is the most dangerous substance known to man.

这是人类已知的最危险的物质。

Formaldehyde is dangerous substance with high toxicity which can induce cancer and abnormality.

甲醛为较高毒性的物质，具有强烈的致癌和致畸作用。

Cesium-137, with a half-life of 30 years, is another dangerous substance emitted in a full-scale nuclear meltdown.

核反应堆完全熔解后，会释放出另一种危险物质铯- 137。铯- 137的半衰期为30年。

Zhang Lanying, director of the Environment and Resources Institute of Jilin University, said that benzene which does not dissolve in water is a dangerous substance.

吉林大学环境与资源学院院长张蓝应说苯不能溶解于水是一种危险的物质。

The results show that the sorption is primary and the degradation is second of the active sludge in the treating city waste by the A/O. The active sludge is a more dangerous substance of second …

结果表明，在A/O工艺处理城市污水过程中，活性污泥的吸附作用是主要的，降解作用是次要的；

Its subject was cholesterol, the vital yet dangerous yellowish substance whose level in the bloodstream is directly affected by the richness of the diet.

研究对象为胆固醇，存于血液内部的一种既有益也有害的微黄色物质，其含量受丰富的饮食影响。

Under the 1971 Misuse of Drugs Act it is classified as a class a, schedule 1 substance - which means not only is LSD considered highly dangerous, but it is deemed to have no medical research value.

LSD是1971年《药物滥用法》中a类第一栏药物。这意味着人们认为它不仅高度危险而且还没有医疗研究价值。

A McCain campaign office received a threatening letter containing an unidentified powder. Authorities say the substance wasn't dangerous, and they already have a suspect.

麦凯恩的竞选办公室收到内涵不明粉末的信函的威胁，官方表示这些物质没有危险，而且他们已经确定了嫌犯。

It takes about three decades for the substance to accumulate to dangerous levels, at which point it can destroy the victim's nerves and organs.

这种物质积累约30年方可达到危险水平，届时它将破坏患者的神经系统和器官。