粉尘、有毒有害气体、放射性物质和其他有害物质引起的危害；

Perils caused by dust, poisonous and harmful gases, radioactive and other harmful substances; and.

河豚鱼、野蘑菇等有毒动植物以及被有毒有害物质污染的食品；

The poisonous animals and vegetables including balloonfish ( globefish ) and wild mushrooms and the food items that are contaminated by poisonous and harmful substance;

目的：通过对汕头贻贝中有毒有害物质的抽样调查，了解其食用安全性。

Objective: To survey the security of Shantou sea-mussel as food, toxic and harmful substances in Shantou sea-mussel were analyzed by spot check.