/daʊt ||; daυt/noun [C,U] doubt (about sth);doubt that ...;doubt as to sth (a feeling of) uncertainty 不确定；怀疑: If you have any doubts about the job, feel free to ring me and discuss them. 你对这份工作如有疑问，请来电商讨。There's some doubt that Jan will pass the exam. 简能否考试及格还不一定。 cast doubt on sth→CAST¹give sb the benefit of the doubt→BENEFIT¹in doubt not sure or definite 不肯定；不确定 no doubt (used when you expect sth to happen but you are not sure that it will) probably （用以估计）很可能，几乎可以肯定，无疑: No doubt she'll write when she has time. 她要是有空，准会写信的。 without (a) doubt definitely 无疑；确实: It was, without doubt, the coldest winter for many years. 毫无疑问，那年冬天是多年来最冷的。