let somebody/something loose
US /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/
UK /lɛt ˈsʌmˌbɑːdi ˈsʌmˌθɪŋ luːs/
1.
放開, 放任
to allow a person or animal to be free, or to allow something to be used or to happen without control
:
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The zookeepers decided to let the animals loose in the larger enclosure.
動物園管理員決定放開動物們到更大的圍欄裡。
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Once he gets a microphone, he just lets himself loose and talks for hours.
一旦拿到麥克風，他就會放開自己，滔滔不絕地講上幾個小時。