孩子们正在后院玩跳背游戏和翻筋头。

The kids were playing leapfrog and doing somersaults in the backyard.

《柯林斯英汉双解大词典》

孩子们正在后院玩耍。

The children are playing in the backyard.

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当观众正在找座位时，这些舞者正在后台做准备运动。

The dancers warmed up backstage while the members of the audience were finding their seats.

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Hooked up to the machine, you believe you are climbing Mount Everest.

被连接在机器上后，你相信,自己正在攀登珠穆朗玛峰。

耶鲁公开课 - 死亡课程节选

I'm actually doing an after party for it, too.

事实上，我正在为此准备一个后派对。

自由的时尚文化 - SpeakingMax英语口语达人

Now one of the new technologies that's evolving, that we're going to talk about in the last half of the course, is taking cells that have been propagated in this way outside the body and encouraging them to form new tissues.

现在,与此相关的新技术正在蓬勃发展,我们将在这学期的后半部分讨论到它,这项技术,让细胞在体外增殖,并促使它们形成新的组织

耶鲁公开课 - 生物医学工程探索课程节选