A device that weighs less than one kilogram is part of a mission that will allow scientists to deliver fourth generation or 4G mobile coverage to the moon in 2019.

这个不足一公斤的设备是一个任务的组成部分，该任务可以让科学家在2019年将第四代或 4G 移动网络覆盖月球。

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Note: a fourth system, the Part Supplier system, can easily extend the architecture of the sample application to address future profile requirements.

注意：为满足未来的概要文件要求，第四个系统-零件供应商系统可以容易地扩展样本应用程序的体系结构。

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It's probably the most painful part of working a fourth shift.

餐厅的风味可能是上第四班最痛苦的部分。

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The fourth part of a five-part series on the Six Day War follows.

NPR: Six Day War: Land Ownership Disputes Arise

That's likely because the show's newest addition will not be a part of the fourth hour for contractual reasons related to her role on syndicated game show Who Wants to be a Millionaire?

FORBES: Magazine Article

It expects a better fourth quarter this year, in part because of the revamped stores.

FORBES: Target Aims To Improve Its Stores, Can Its Stock Follow Suit?