start up
/stɑɹˈtʌp/ 动词- To rise suddenly. · He started up when he heard the scream.
- To commence the operation of; to activate; to launch. · The four of them started up a law practice.
- To begin to operate. · The engine started up right away.
- To begin. · The band started up playing.
- To begin to make a sound · First a solitary blackbird started up, but soon the whole forest was alive with birdsong.
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