2 sentences for 门槛 (mén​kǎn — threshold)

1. 他迈过高高的木门槛，进了正屋。

   tā mài​guò gāo gāo de mù mén​kǎn, jìn le zhèng​wū.

   He stepped over the high wooden threshold and entered the main room.

   Source: Dong Chinese Dictionary

2. 他在门槛上划了一个深深的记，用来观察水位的变化。

   tā zài mén​kǎn shàng huá le yī gè shēn​shēn de jì, yòng​lái guān​chá shuǐ​wèi de biàn​huà.

   He carved a deep mark on the threshold to observe the changes in the water level.

   Source: Dong Chinese Dictionary