英语语法分析

We can follow the railway lines through the security perimeters and into the elite compounds.

跟着铁路线穿过保安区就进入了核心地带。

Security perimeters are essential for any big competition and are important for the smooth process of security.

场地周边安保系统的好坏是大型赛事能否成功的根本之所在，也是赛事安保能否顺畅运行的关键。

It's interesting to know that when we measure the output of the heart, there is about 30 different perimeters that are measured.

有趣的是，当我们测量心脏的，输出量时，我们需要测量30种不同的周长。