trade secret
US /ˈtreɪd ˌsiː.krət/
UK /ˈtreɪd ˌsiː.krət/

1.
商业秘密, 商业机密
a secret formula, practice, or process used in a business to give it an advantage over competitors
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The recipe for their famous sauce is a closely guarded trade secret.
他们著名酱汁的配方是严密保守的商业秘密。
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Companies often use non-disclosure agreements to protect their trade secrets.
公司通常使用保密协议来保护其商业秘密。