3 sentences

1. 他打开门站在门槛上。

   tā dǎ kāi mén zhàn zài mén​kǎn shang.

   He opened the door and stood on the threshold.

   Source: CCMatrix

2. 她小心翼翼地跨过门槛。

   tā xiǎo​xīn​yì​yì de kuà guò mén​kǎn.

   She stepped over the threshold very carefully.

   Source: CCMatrix

3. 不要把门槛设得很低。

   bù​yào bǎ mén​kǎn shè de hěn dī.

   Don’t make the threshold too low.

   Source: CCMatrix