No one has come up with a definitive answer as to why this should be so

　　對(duì)于為什么應(yīng)該是這樣，還沒(méi)有人想出最終確定的答案。

　　The president was moved to come up with these suggestions after the hearings.

　　聽(tīng)證會(huì)促使總統(tǒng)想出了這些建議。

　　Keep your eye on these jokers, you never know what they will come up with.

　　留神那些活寶，你永遠(yuǎn)也不知道他們會(huì)想出什么樣的主意。

　　See if you can rework your schedule and come up with practical ways to reduce the number of hours you're on call.

　　看看能不能修改你的日程安排表，想出切實(shí)可行的辦法來(lái)減少你值班的時(shí)間。

　　Howard Wilkinson has come up with an absolute corker of an idea.

　　霍華德·威爾金森想出了一個(gè)絕佳的主意。

　　She put forward some cogent reasons for abandoning the plan.

　　她為放棄這個(gè)計(jì)劃提出了一些具有說(shuō)服力的理由。

　　Over the years several similar theories have been put forward

　　幾年來(lái)已經(jīng)有好幾個(gè)類似理論相繼提出。

　　They put forward many valid reasons for not exporting

　　他們提出了很多不出口的正當(dāng)理由。