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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The oil refinery in the borough of Azcapotzalco, which was said to belch out up to 7% of Mexico City’s air pollution, was shut in 1991. Some of its land was converted into a park.

阿斯卡波察尔科行政区的石油精炼厂在1991年被关闭了，该炼油厂曾被估测出排除的污染物占墨西哥空气总污染物的7%，关闭之后，它的大部分场地被开垦重建成公园。

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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