Historians say Congress was also unsure about the loyalties of the Alaska natives -- the Aleuts, Indians and Eskimos.

VOA: special.2009.03.02

If you're unsure about that, check out, of course, chapter three in the textbook, where these issues are addressed.

当然,如果还不确定,可以看看课本的第三章,这些问题都提到了

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And you were unsure that it was offensive beforehand.

而事前你并不清楚这对客户来说是一件忌讳的事。

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Some of the people questioned said they felt unsure of themselves in social situations.

VOA: special.2009.11.17

But many non-scientists are unsure about whether humans evolved over millions of years.

VOA: special.2009.02.25

The work makes a statement about the unsure nature of money and chance.

VOA: special.2009.07.17

But now those economists are unsure of the future.

VOA: special.2009.03.02

And say they are unsure whether there will ever be a normalization of Zimbabwean politics, given ZANU-PF's 30-year domination of the country.

VOA: standard.2009.09.15

Many banks have been reluctant to loan money because they are unsure if they will need their cash reserves to cover the cost of billions of dollars in questionable loans, which are frequently referred to as toxic assets.

VOA: standard.2009.03.23

"Now saying we are going in with a plan of getting out tells not only our troops that we are unsure support, but it tells the people of Afghanistan that the United States does not have the will to stay,"

VOA: standard.2009.11.23