3.1 Terms and Symbol Roses are not called roses, and they are still aromatic. --William shakespeare3.2 mode mode is an important reason for errors, confusion, unnecessary restrictions and complexities existing in the interface. For a given operation, if the industry faces it, it is fixed, then the interface is a certain specified mode. For example, there is a normal button on the flashlight to switch between lighting and extinguishing. The problem is that in this case you can't justify the touch, it is not bright. For example:
