threshold

他进门时差点被门槛绊倒。

He almost tripped over the ___threshold when entering the room.

他站在门口犹豫了一会儿才跨过门槛。

He hesitated for a moment before stepping over the ___threshold.

她的成绩达到了这所大学的最低录取标准。

Her grades met the ___threshold for admission to this university.