In South China the maximum of DTR is in winter.

华南地区仍以冬季下降最大.

DTR you can simply integrate your bug fixes of older releases into the new releases.

使用DTR,就能够很简单地在进行系统调试时,将老版本的信息整合到新版本中.

In Huang - huai and Yangtze River reaches the maximum decreases of DTR are in summer and spring.

在黄淮和长江流域,以夏季和春季DTR下降最为显著.

Compared with DTR, the MTR system decreases the complexity of system because of no differentially encoded data with basic performance consistency.

与差分传输参考（DTR）系统相比，两者误码性能基本一致，但这种收发方式因无需差分编码降低了系统的复杂度。