adj.不肯定的；不確定的；沒(méi)有自信的

Consult your dictionary when you are unsure of your spelling. 當(dāng)你不敢肯定拼寫(xiě)時(shí),就查閱一下詞典。

He was unsure of what to do next. 他對(duì)下一步該做什么猶豫不定。

If you are unsure about what to pick, click here. 如果您不確定應(yīng)該選擇哪個(gè)選項(xiàng)，請(qǐng)單擊此處。

Matteo Brighi admits he's unsure of his future at Rome. 布里吉承認(rèn)他不確定他在羅馬的未來(lái)。