understudy ['ʌndə,stʌdi]

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vi. ѧ���湤

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n. standby
v. alternate

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1. He is understudying Hamlet.
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2. If one area has dysfunction or damage, another can step in like an understudy and play the role.
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3. Reina feels his situation with the Spanish national team is similar to that of his Anfield understudy Diego Cavalieri.
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n.
  1. an actor able to replace a regular performer when required
  2. be an understudy or alternate for a role

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understudy
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Understudy assignment
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understudy system
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