槛

tā mài guò mén kǎn

他迈过门槛。

He stepped across the threshold.

wǒ dǎ kāi mén kuà guò le mén kǎn

我打开门，跨过了门槛。

I opened the door and stepped across the threshold.

jiān guǎn de mén kǎn hěn gāo

监管的门槛很高。

The threshold for regulation is high.

suǒ wèi mén kǎn guò qù le jiù shì mén méi guò qù jiù shì kǎn

所谓门槛，过去了就是门，没过去就是槛。

The so-called threshold, is before the door, not the past to become the sill.