当温度低于零度时，就达到了水的冰点阈值。

When the temperature drops below zero, it reaches the ___threshold for water to freeze.

站在新家的门槛上，她感到无比兴奋。

Standing on the ___threshold of her new home, she felt incredibly excited.

当温度超过设定阈值时，空调会自动启动。

The air conditioner turns on automatically when the temperature exceeds 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.