As we have seen during this test and those of previous years, police laser gun transmissions are very narrow and detectors have a difficult, if not impossible task, of providing any advanced warning.

• 我们这种这一个测试在前数年前已经见到，因为警察雷射枪传输面积非常狭窄，而且雷达测速器侦测尚有困难，要提供任何前方行进间的雷射警告,算是比较困难的。