keep your hand in
US /kiːp jʊər hænd ɪn/
UK /kiːp jʊər hænd ɪn/
1.
保持手感, 不荒廢技能
to continue to do something regularly so that you do not lose your skill
:
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Even though she retired, she still teaches a class once a week to keep her hand in.
儘管她退休了，她仍然每週教一節課以保持她的技能。
•
He likes to play chess occasionally just to keep his hand in.
他偶爾下棋只是為了保持手感。