lock down 的用法（lock up和lock down的区别）

1.If we think we have the power to achieve what we want, then similarly, our minds will automatically lock down on all the evidence that supports that thought.如果我们觉得自己有能力达到它，那同样地，我们的大脑也会自动地锁定一些证据来支持这个想法。

2.You can use private properties to really lock down our classes.可以使用private属性来真正锁定类。

3.We need to lock down the building now.我们得马上封锁全楼