n.转换；开关
动词switch的现在分词形式.
In effect he is not giving up power, only switching offices. 事实上，他并没有放弃权利，只是转换了职务。
NOTE 1 The different positions of controls and switching devices are taken into account. 把控制器和开关在置于不同位置的因素考虑在内。
The switching reliability and long service life are guaranteed by either a silver plated or optional gold plated contact. 镀银的或镀金的接点保证了开关的可靠性和使用寿命。
