not able to be relied on; not known or definite 不可靠的;未知的;不确定的 an uncertain future. 前途未卜。 ■(of a person) not completely confident or sure of something (人)不自信的;无把握的 I was uncertain how to proceed. 我没把握下一步该怎么做。
常用词组 in no uncertain terms
clearly and forcefully 毫不含糊地 she has already refused me, in no uncertain terms. 她已经毫不含糊地拒绝了我。