律师函是指由律师当事人起草并发出的法律文件，通常用于解决法律纠纷或处理法律事务。它是一种正式的书面文件，具有法律效力，可以作为证据在法庭上使用。

How to read: lǜ shī hán

Usage: 律师函 is used when a lawyer represents a client in drafting and sending a legal document, typically used to resolve legal disputes or handle legal matters. It is a formal written document with legal force and can be used as evidence in court.

例句1：当我收到对方的律师函时，我立即了我的律师以寻求帮助。

Sentence 1: When I received the lawyer's letter from the other party, I immediately contacted my own lawyer for assistance.

例句2：请注意，如果你不遵守协议条款，我们将不得不向你发送一封律师函。

Sentence 2: Please note that if you do not comply with the terms of the agreement, we will have to send you a lawyer's letter.

例句3：根据我收到的律师函，我必须在两周内做出回应。

Sentence 3: According to the lawyer's letter I received, I must respond within two weeks.

例句4：他们决定雇佣一位知名的律师来起草这封重要的律师函。

Sentence 4: They decided to hire a well-known lawyer to draft this important lawyer's letter.

例句5：律师函中提到了我们应该采取的法律行动，以保护我们的权利。

Sentence 5: The lawyer's letter mentioned the legal actions we should take to protect our rights.

Synonyms and Usage: 法律函件 (fǎ lǜ hán jiàn) is another term for 律师函 and can be used interchangeably. Both terms refer to a legal document drafted by a lawyer on behalf of a client.

Editor's Summary: 律师函是一种由律师当事人起草并发出的正式法律文件，通常用于解决法律纠纷或处理法律事务。它具有法律效力，可以作为证据在法庭上使用。与之同义的词语为法律函件，两者可以互换使用。如果收到律师函，请务必及时自己的律师以寻求帮助。