The chemical and volume control system functions to maintain the coolant inventory, to control the coolant chemistry and to adjust the boron concentration of the reactor coolant system.

化容系统的功能：维持主系统的水装量，控制主冷却剂的化学性能和调节主系统的硼浓度。

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The administration's funding authorization expires Sept. 30, and it needs more money to address the booming volume of air traffic, primarily because the air traffic control system needs safety and security upgrades.

FORBES: Magazine Article

Also on the docket is an eye-controlled set that lets viewers take charge of volume and channels with their peepers and a 3D gesture control system that has a camera built into the set's frame.

ENGADGET: Haier celebrates IFA with ultra high def 3D, transparent and eye-controlled TVs

Air traffic was growing, and the air traffic control (ATC) system couldn't handle the swelling volume.

FORBES: Magazine Article