该雷达具有两个固定平面阵天线，每个扇形覆盖90度，从而实现同步覆盖180度。
The radar features two stationary planar array antennas, each covering a sector of 90 degrees, thus achieving 180 degrees of simultaneous coverage.
同步覆盖：在单元测试中极力推荐测量代码覆盖，但是在测试并行程序时使用它，代码覆盖容易产生误导。
Synchronization coverage: Measuring code coverage is a highly recommended practice in unit testing, but when it comes to concurrent programs, code coverage is misleading.
最后，如果覆盖或过载成员函数并更改其同步，则也应该写明原因。
Finally, if you override or overload a member function and change its synchronization, you should also document why.
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