a rather improbable story 不太可能是真实的故事
it is improbable (that) It’ s improbable that a lawyer would give such advice. 律师是不大可能给出这种建议的。
highly improbable It seemed highly improbable he would return to work. 他会回来工作这事看起来极不可能。
an improbable friendship between two women of very different backgrounds 两个背景迥异的女人间出人意料的友谊