retain
US /rɪˈteɪn/
UK /rɪˈteɪn/

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聘請, 僱用
secure the services of (a lawyer, etc.) with a preliminary payment
:
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The company decided to retain a new law firm.
公司決定聘請一家新的律師事務所。
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He paid a fee to retain the services of a consultant.
他支付了一筆費用以聘請顧問的服務。