Swallows fly about, carefree and at liberty.

燕子自由自在地飞翔。

《新英汉大辞典》

It sang of the happy days when it could merrily fly about, of fresh green corn in the fields, and of the time when it could soar almost up to the clouds.

他歌唱着当初他快乐地到处飞的日子，歌唱着田野里鲜绿的谷粒，歌唱着他向云朵翱翔的时候。

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I shook with terror whenever I was about to fly in a plane.

我每次要坐飞机时都害怕得发抖。

《柯林斯英汉双解大词典》

She made speeches about flying. And she continued to fly by herself across the United States and back.

VOA: special.2010.05.26

About twenty thousand brown pelicans fly south from the American state of Oregon each winter.

VOA: special.2010.03.02

Even with poor gas mileage on most RV units, these vagabonds can travel for about one-fifth what others pay who fly, buy meals in restaurants, and stay in motels.

VOA: standard.2010.03.01

ICO's ten satellites fly about 9, 000 kilometres higher in medium-earth orbit and have a life-span of 12 years.

ECONOMIST: Is Iridium about to fall to earth?

ICO's satellites will fly about 9, 000 kilometres higher in medium-earth orbit.

ECONOMIST: Staying in touch | The

Last year, it distracted attention from this failure by unveiling the glamorous new Sonic Cruiser, designed to fly about 20% faster than today's big jets, so cutting an hour off a transatlantic flight.

ECONOMIST: Boeing v Airbus