Liver cancer is linked to the hepatitis B virus.肝癌与乙肝病毒存在关联。As a major health risk hepatitis is second only to tobacco.肝炎是仅次于吸烟的主要健康隐患。We should require that every student is immunized against hepatitis B.我们应要求每个学生都注射乙肝疫...
大多数疾病是可以被消灭的.Most diseases could be wiped out.它反映了一种想法即物质是不可消灭的.It expresses the notion that matter is indestructible.而一切旧势力, 不管它们的数量如何庞大, 总是要被消灭的.Conversely, all the old forces, however numerous, are bound to be elimina...