threshold

1.门槛；门口the floor or ground at the bottom of a doorway , considered as the entrance to a building or room

2.阈；界；起始点the level at which sth starts to happen or have an effect

3.[ususing]开端；起点；入门the point just before a new situation, period of life, etc. begins

1.【物】临界值,阈

2.门槛;入口,门口

3.入门,开始,开端

4.界限,限度

5.【心】阈限

1.a limit at which an arrangement changes. For example a tax threshold is the level of income or profit at which you start to pay a tax; a level at which something happens. For example, your hearing threshold is the level of sound that you can hear, and your pain threshold is the level of pain that you can feel without suffering or complaining

2.the floor at the entrance to a room or building