The length of the war is one of the biggest unknowns.战争要持续多久是最大的未知数之一。There are many unknowns in science.科学上还有许多未知之处.It was like a single equation with two unknowns.这挺像两个未知数组成了个简单方程....

unknowns的音标：unknowns的英式发音音标为：[ʌn'nəʊnz]unknowns的美式发音音标为：[ʌn'noʊnz]...

n.不知名或不出名的人( unknown的名词复数 )，未知的事物，未知数...