They are all understandable , but given the importance of the problem and the key role that senior specialists play in determining public opinion and hence public policy , i feel that none of them is a legitimate excuse 它们都是可以理解的，但倘若问题重大，前辈专家在决定公众意见、因此也决定公众政策中所起的关键作用，我感到三条理由中没有一条是合理的借口。
