The principle, method and relative influence factors of the trace line of PE pipe are introduced.

介绍了PE管示踪线的探测原理和方法及相关影响因素。

youdao

Trace is turned on by specifying any command line parameter to the program when it is invoked.

在调用这个程序时指定任意命令行参数将开启跟踪功能。

youdao

Just stay on the line so we can trace the call.

您只要不挂线，我们就能追踪到您。

youdao

Researchers have been able to trace a line between some of the earliest modern humans to settle in China and people living in the region today.

BBC: Fossil human traces line to modern Asians