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

1.
商業秘密, 商業機密
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.
他們著名醬汁的配方是嚴密保守的商業秘密。
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Companies often use non-disclosure agreements to protect their trade secrets.
公司通常使用保密協議來保護其商業秘密。