通行证 (tōng xíng zhèng) — (noun) travel pass, permit (for crossing borders, entering restricted areas, etc.); (noun) qualification certificate, ticket (allowing access to a certain field or opportunity)

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예문

• 去香港需要办理通行证。
  Qù xiāng gǎng xū yào bàn lǐ tōng xíng zhèng.
  You need to get a travel pass to go to Hong Kong.
• 学历是职场的一张通行证。
  Xué lì shì zhí chǎng de yì zhāng tōng xíng zhèng.
  Education is a ticket to the workplace.
• 没有通行证，你不能进入这个区域。
  Méi yǒu tōng xíng zhèng, nǐ bù néng jìn rù zhè ge qū yù.
  Without a pass, you cannot enter this area.