1、懷疑，無(wú)把握，拿不準(zhǔn)=doubtful
I was rather dubious about the whole idea.
我對(duì)這整個(gè)想法都持懷疑態(tài)度。
2、可疑的，不可信的，靠不住的，不誠(chéng)實(shí)的=suspicious
They indulged in some highly dubious business practices to abtain their current position.
他們采取了一些極為可疑的商業(yè)手段以取得在目前市場(chǎng)上的地位。
3、不確定的，不一定好的
They consider the plan to be of dubious benefit to most families.
他們認(rèn)為這項(xiàng)計(jì)劃對(duì)大多數(shù)家庭不一定有好處。
