Another negative feature of hydrogen is that it is hazardous material.

氢气的另一个缺点是：氢是一种易爆的物质。

Superfund, the hazardous material cleanup group, does not seem to work well.

有害物质清除组织超级基金似乎没有起到什么作用。

The remaining 20% is considered hazardous material that may be infectious, toxic or radioactive.

剩余的20%被视为具有感染性、毒性和放射性的有害物质。

It has become potential hazardous material in aquatic environment for its toxic and distribution.

由于其毒性大、分布广，从而成为水环境中的重要潜在危害物质。

With the increasing demand of hazardous material, Traffic accidents of transportation increasing fast.

随着危险品公路运输需求的增加，危险品公路运输事故与日俱增。