建设节约型城市，城市规划一方面要在配合循环经济兴起的同时，防止循环经济可能存在的虚热所带来的负面影响；

To build a resource-efficient city, urban planning should, on the one hand, prevent the negative influence of the circular economy while sup- porting its rise.

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编译器可以使用间接调用执行优化，如提升循环外虚方法地址的加载。

The compiler can perform optimizations with indirect calls such as hoisting the load of a virtual method address out of a loop.

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在相干光正交频分复用系统中，本文提出了一种新型的基于循环前缀和虚载波的盲频偏估计方法。

A new blind frequency offset estimation method based on cyclic prefix and virtual subcarriers in coherent optical orthogonal frequency division multiplexing (CO-OFDM) system is presented.

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