Hold the windsock up in the air by its string and run around.

用绳子把风向标举起来，然后跑一圈。

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Since a plant uses it up in the air around, the plant needs moving air to bring more CO2 close to its surface!

由于植物会将周围空气中的二氧化碳耗尽，因此需要空气流动将更多的二氧化碳带到其表面！

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After Hamas stepped up its rocket attacks at the end of 2008, Israel began a major offensive in the Gaza Strip, launching air strikes and a ground invasion.

在2008年末哈马斯增加了他的火箭进攻，以色列开始了在加沙地带的主要进攻，发动了空中袭击和陆地侵略。

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Boeing managed to get its 787s up in the air again and resumed deliveries.

FORBES: Boeing Bleeding Cash As 787 Dreamliners Cost $200M But Sell For $116M, But Productivity Is Improving

While its implementation remains up in the air, SUNY aims to introduce Coursera materials this fall and over the next few years as part of its Open SUNY initiative.

ENGADGET

McKesson's contracts with two of its biggest customers are up in the air.

FORBES