They fly up into the sky.

她们飞向天空。

youdao

They thought they would fly up to the sky, and have a joke there.

他们想飞上天空，在那里开个玩笑。

youdao

There are so many creatures up there, they are so busy, so athletic, so tiny, that we had to fly up and give you a peek.

那么多的生物在那里，他们是如此地忙碌，如此地矫健，如此地微小的，让我们也飞起来，偷看它们一眼吧。

youdao

They were designed to fly at speeds up to six thousand four hundred kilometers an hour.

VOA: special.2010.07.07

With their wings beating up to 80 times a minute and their hearts beating hundreds of times a minute, they fly up, down, forwards and even upside down and backwards.

BBC: Hot springs and hummingbirds in Ecuador

As bees fly, they generate up to 450 volts of static electricity, which causes pollen grains to jump on.

FORBES: The Buzz

European critics have said the current deal offers greater advantage to U.S. carriers by allowing them to operate within the EU. An American airline can, for example, fly from New York to London, where they could pick up passengers and then fly to Germany.

CNN: Open Skies: the bell rings for round two