If you are unclear about why it's correct, do not worry.

如果你不清楚为什么它是正确的，不要担心。

It is unclear about the fate of the bills in the Republican-controlled Senate.

目前尚不清楚这两项法案在共和党控制的参议院的命运如何。

When he is unclear about something, he quizzes and challenges his staff. " Educate me on that, " he might say, looking to make clear a vague statement.

遇到不太明白的说法，他就询问甚至质疑他的手下。“请就此明示，”他会这么说，希望把不清楚的地方弄明白。

That commanders are unclear about, but they do believe that they will be able to fulfill the prime minister's goal of liberating Iraq's second largest city by the end of the year.

指挥官们不清楚，但他们确实相信他们能够实现总理的目标， 即在年底前解放伊拉克第二大城市。