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开关通断
1、both on and off───开和关
2、off on───关-开
3、off and on───断断续续地,时不时地;不时; 断断续续地; 间歇地; 时作时辍
4、switching on───n.接入;打开电灯开关;合闸
5、switching───v.转换(switch的ing形式);n.[电]开关;转换;整流;配电
6、on and off stage───台上台下;台前幕后
7、go on and off───开关
8、on off───开关离合通断双位式;adj.时断时续的; 离合的; 双位的
9、on and off───断断续续地,不时地;不时; 断断续续地; 间歇地; 启闭
1、Operating principle of power factor compensating device for 8k electric locomotive is briefly described as well as its parameter selection, switching on and off control.───概述了8 K机车功率因数补偿装置的工作原理、参数选择及投切控制。
2、Don't use too much force when switching on and off faucets. Only a gentle rotating is ok.───再有就是开关水龙头不要用力过猛,只要顺势轻轻转动就可以。
3、Try switching on and off again.───尝试再次打开和关闭。
4、The rapid switching on-and-off of these pulses can cause waves in the fluid which sound like a high-pitch tapping.───脉冲的变化会引起羊水波动,听起来就像很响的叩击声。
5、On the keyboard of Martin-decker, rows of signal lights can be seen switching on and off rapidly all the time.───在马丁代克仪表的键盘上可以看到,一排排的信号灯总是在迅速地忽明忽暗。