例句與造句

1. Dupont has committed to virtually eliminate the sources of exposure to pfoa from our manufacturing operations and products by 2015
   杜邦公司已經(jīng)承諾，到2015年，在我們的制造過程和產(chǎn)品中，從本質(zhì)上消除pfoa的接觸途徑。
2. According to the serology test that was returned from previous cases who could not be linked to a known source of exposure , 52 per cent were subsequently found to be negative for coronavirus
   根據(jù)過往未能確定源頭個案的冠狀病毒血清測試結(jié)果顯示，百分之五十二的個案最終對冠狀病毒呈陰性反應(yīng)。
3. It's difficult to find source of exposure in a sentence. 用source of exposure造句挺難的