fallout radioactive material

基本解釋

refrain from harvesting after radioactive material fallout.
有放射性物質(zhì)落下時不要進行採收。
Unless a large explosion sends radioactive material high into the atmosphere, most of the fallout from Japan will not make it across the Pacific Ocean.
除非發(fā)生了大爆炸，將放射性物質(zhì)送入高層大氣，否則日本産生的放射塵是不會越過太平洋的。
This is highly pertinent. The wind direction, should there be a plume containing radioactive material, determines whether fallout will land on populated areas or in the sea.
這是一個關(guān)鍵問題，如果含有放射物質(zhì)的雲(yún)團出現(xiàn)，那麼風(fēng)曏將決定這些放射性墜塵會降落在聚居地還是海洋。