radioactive contamination造句怎么写

People who remain within a radius of 20 kilometres of the site have been ordered to leave and those living between 20-30km away instructed to stay indoors, so as to avoid radioactive contamination.

You may have another certificate showing the goods to be free from radioactive contamination.

In library, the contaminations can be divided into four parts: i. e. chemical contamination, physical contamination, biological contamination and radioactive contamination.

S. Seventh Fleet, stationed 100 miles offshore, repositioned its ships and aircraft after some if its personnel came into contact with radioactive contamination.