I have a thank you letter I need to write but there are two more people I need to send a letter to also and it would be efficient to send them at the same time.
我要给你写封感谢信，但是我还得给另外两个人写信，只需要写一封信，同时发给他们，这样更有效率，因为还没给他们写，所以也没给你写。
The run time is designed to be small and efficient for use on mobile devices.
运行时环境为手机设备设计，小巧且有效。
The run time is designed to be small and efficient for use on mobile devices.
运行时环境为手机设备设计，小巧且有效。
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