Space activity has produced valuable inventions such as global positioning devices that have had lucrative commercial applications.

航天行为已经产生了像全球定位装置这种赚 钱的商业应用的有价值发明。

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Accelerometers are used in activity trackers and apps that count steps or other exercise. They also are used in global positioning system apps, also called GPS.

加速度计被用于运动跟踪器以及统计步数和其它运动的应用程序。它们还被用于全球定位系统应用（GPS）程序。

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Front month put positioning contrasts with April expiry activity in far out-of-the-money put options.

FORBES: Options Players Loving Lululemon, Deckers Gets The Boot

By somewhere around Dec. 16 to 21, much of the activity likely will be book-squaring rather than fresh positioning ahead of year-end, he said.

FORBES: Palladium Hits 11-Week High On Renewed Concerns About Russian Supplies

The stock is off its lows of last week, and activity in September contract call options this morning suggests traders may be positioning for a near-term rebound in the price of the underlying.

FORBES: Options Players Sweet On Dunkin' Brands Calls As Quiet Period Winds Down