寸步

zài zhè me dà de yǔ li rén men cùn bù nán xíng

在这么大的雨里人们寸步难行。

In such a heavy rain, people are difficult to move even one inch.

tā cùn bù bù lí de gēn zhe tā de ér zi

他寸步不离地跟着他的儿子。

He follows his son closely.