The stability of improved controlling system has been improved.

改进后的自控系统稳定性明显提高。

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First, the kernel build system has been improved for quicker builds compared with 2.4.

首先，相对于2.4来说，改进了内核编译系统，从而获得更快的编译速度。

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The precision and reliability of wind velocity sensor in system has been improved.

正确的确定将会提高风速传感器在系统中运行的精确性和可靠性。

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The real world range has also been improved with the introduction of a new heating system which is 70 per cent more efficient through the use of a heat pump in the system.

ENGADGET: New Nissan Leaf comes to the UK with battery leasing option, extended range

The IRS has improved the system so that you can check when your tax return has been received, when your refund has been approved and when it has been sent to you.

FORBES: As Tax Season Approaches, IRS Releases 2013 Refund Information