It is a challenging proposition to sell a non-standard ad format with an unknown brand.

通过一个不知名的品牌销售一个非标准形式的广告，这是一个挑战。

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The term solar sail is a misnomer, since Count Dooku's interstellar sloop USES an as-yet unknown brand of energetic propulsion far more exotic than stellar radiation.

“太阳帆船”这一称呼其实并不恰当，因为杜库伯爵的星际小帆船利用的是一种至今仍不清楚类型的能量推进力，它远比恒星辐射更奇特。

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Many liken the process to a space launch, since each new record-topping tower is, in effect, a brand new mission into the unknown.

很多人都把这个过程比作太空探索，因为要新建一幢破纪录的高楼，意味着在未知领域的全新任务。

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"However for a relatively unknown brand to push the size barriers this far is a risk, " he added.

BBC: CES 2013: Chinese enter Western mobile device market

Why should shoppers gamble on an unknown brand out of town when they can deal with larger, more trusted names in business?

FORBES: Robbing the Cradle

And if it's some unknown brand, all the better.

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