# be sure about ##### 词义 - 美：/ bi ʃʊr əˈbaʊt /； - #词性/v 确定的，毫无疑问的 ##### 例句 - People may not be sure about life on Mars until a sample of life is brought back. - 人们可能不确定火星上是否有生命，直到一个生命样本被带了回来。 - Be sure about the purpose of writing the feature story. - 确定好写特写的目的。 - That is scary, and we cannot be sure about changes in the future. - 这是可怕的，因为我们无法确定未来会发生什么变化。