A small balloon was sent up first to check the weather.

先发射一只小气球以检测天气。

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When the little guests leave, they each get a small present and a balloon.

小客人们走的时候，每人可得到一份小礼物和一个气球。

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The idea was to pump a small amount of water up to the balloon and thence out into the air, so as to assess the possibility of spraying out other substances at far greater heights.

气球升空后，实验性地通过输送管在空气中喷洒水，为估计在更高气层中喷洒其他物质的可能性。

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Researchers said the negative vertebroplasty findings raise questions about the effectiveness of a related procedure called kyphoplasty, in which the cement is injected after a small balloon is inflated to restore the shape of the broken vertebra.

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Living in a media fish bowl, even small incidents can balloon into a crisis, and in an Internet age, with information spreading at warp speed, it is wiser to quickly eliminate the threat of controversy.

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In three separate procedures, Dr. Shishehbor used a balloon embedded with a wire that cuts through calcified plaque and implanted two stents to prop open a small artery in Mr. Swartz's foot.

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