一定之规

shì qing fā zhǎn yǒu yī dìng zhī guī

事情发展有一定之规。

Everything follows a fixed pattern in its development.

zhè zhǒng shì bìng wú yī dìng zhī guī

这种事并无一定之规。

There's not always logic to these things.

tā zuò shì yǒu yī dìng zhī guī

她做事有一定之规。

She has his own way of doing things.

rén yuè lǎo jiù yuè yǒu yī dìng zhī guī

人越老就越有一定之规。

As people get older, they become more set in their ways.