Toxaemia may be a contributing factor in occasional acute cases in which the pigs collapse and die suddenly . 在猪出现虚脱和突然死亡的个别急性病例中，毒血症可能是一种原因。
Nucleotide sequences homologous to oncornaviruses dna products have been observed in human leukaemic cells . 在人白血病细胞中，已经观察到与肿瘤毒病DNA产物相同的核苷酸序列。
I had an evil counsellor within, and he was continually prompting me to relieve myself by the worst means . 我心里有个毒恶的纵容我的人，他不断地唆使我用最卑鄙的手段救济我自己。
Since viral reservoirs and means of transmission are poorly understood, methods of prevention have not been developed . 因为对恶性卡他热病毒的储主和传播方式了解得很少，所以还没有防治办法。
At the same time, drug agents are finding that the cocaine they seize is two or three times purer than that seized last year . 同时，查毒人员发现，他们查获的可卡因比去年查获的纯度要高二至三倍。
He trotted through the sand, enduring the sun's enmity, crossed the platform and found his scattered clothes . 他忍着骄阳的毒焰，小步跑过沙滩，横穿过高山沙滩的平台，找到了他东一件西一件的衣服。
This will vary with the local or total number of virus sources, but also with the efficiency as a vector of the prevalent aphid clones . 带毒蚜的多少因地区或因毒源总数而异，但也与优势蚜群传毒力有关。
