Gimbal lock is a phenomenon that easily affects Euler Angle representations.
万向节锁是一种容易影响到欧拉角表现的现象。
2
Sometimes we focus too much on pressing the feet together real hard in the kick if you lock the knees together and the Angle bones together.
有时候我们在打腿时太注重于将脚使劲并在一起了，就像把膝盖和踝骨锁在一起似的。
3
This is generally not important, but the lock may have been snapped at an Angle that is impossible when the door is closed, indicating fraud or misdirection from the real method of entry.