地铁列车运行极其准时，总是按照时刻表运行。

The subway trains run with perfect ___regularity, always on schedule.

她每天早晨6点起床，生活规律性很强。

The ___regularity of her daily routine is impressive—she wakes up at 6 am every morning.

他每周去图书馆的规律性令人钦佩。

The ___regularity with which he visits the library every week is admirable.