active-standby switch 主备切换
Standby switch I closes 备用开关I合闸
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And don't leave electronics on standby, switch them off.
不要让电器在待命状态，不用就立即切断电源。
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The power button however isn't your normal standby switch and is in fact, a real, live power switch.
ENGADGET: HD Review: NeoDigits X5000 Networkable DVD player
Highways teams are on standby to switch from routine highways maintenance work to snow clearance duties.
BBC: Gritter
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