切换操作 meaning in English

blocked operation
switching operation

Figure 11 . toggle action to display unread messages
图11 .显示未读邮件的切换操作
When using nfsv3 , you can use two techniques to provide a more appropriate failover behavior
当使用nfsv3时，可以使用两项技术提供更合适的故障切换操作：
A chip based on electroelution principle was presented for the recovery of dna fragments , which can make the isolation and collection of target dna fragments possible in a single process by switching electrodes
提出了一种基于电洗脱原理的核酸纯化回收芯片，通过对芯片上电极进行适当的切换操作，可一次完成核酸样品分离和纯化回收。
While tv signal is switched , scm outputs volume adiusting code with refference to default volume in a certain period to realize closed loop control of tv accompanyind sound , afterwards back to open loop control
当信号切换操作时，在一定时间内以默认音量值为参照，由单片机发出电视接收机音量调节编码，实现电视伴音音量闭环调控，调控结束后恢复开环形式。