They were incinerating hazardous waste without a licence.(他們沒有許可就把危險廢棄物燒成灰燼。)

The city's weather bureau gave air quality a rare hazardous ranking.(城市氣象局給了今天的空氣質量一個罕見的危險排名。)

The second-most-hazardous energy source?(而第二危險源是什么呢？)

The dense smoke also created hazardous air quality over a broad region.(火災產生的濃煙在很大范圍內嚴重影響了空氣質量。)

As I said, it's a particularly hazardous substance and is worked with in fume hoods.(就像我說過的，這是尤其有害的物質，在通風柜中才能用。)

Sitting is hazardous. It's dangerous.(久坐是有害的，是危險的。)

The radiation such phones emit is hazardous to one's health.(手機發出的輻射對健康不利。)

Laboratory specimens may be hazardous and must be handled with extreme care.(實驗室標本可能有害，必須極其謹慎地進行處理。)

My other job was less hazardous but more interesting.(我另外的那個工作不像這個工作這么冒險，但更加有趣。)

The moon is continuously being pelted by hazardous radiation.(月球不斷地遭受有害輻射的襲擊，多數輻射來自太陽風。)