The word "相信" (xiāngxìn) in Chinese means "to believe" or "to trust" in English. 

Usage in Sentences

1. To believe in something: "相信" is used when expressing belief in the truth of a statement, fact, or idea.

   • 例句: 我相信他说的话。
   • 英文: I believe what he said.

2. To trust someone: It can also mean trusting a person, implying faith in their reliability or honesty.

   • 例句: 我非常相信我的朋友。
   • 英文: I trust my friend very much.

3. Used to express confidence or faith: "相信" can be used to show confidence in an outcome, plan, or future event.

   • 例句: 我相信我们一定会成功。
   • 英文: I believe we will definitely succeed.

Sentence Structure

• Subject + 相信 + Object: This structure is used when stating belief or trust in someone or something.
• Subject + 相信 + Clause: Used when expressing belief in a specific statement or outcome.

Examples

1. Expressing belief in a statement:

   • 中文: 我相信他明天会来。
   • 英文: I believe he will come tomorrow.

The word "联系" (liánxì) in Chinese means "to contact" or "connection" in English. 

Sentence Structure

• Subject + 与/和 + Object + 联系: Used when talking about contacting someone.
• 保持 + 联系: Used to describe keeping or maintaining contact.

Examples

1. As a verb (to contact):

   • 中文: 请联系我以获取更多信息。
   • 英文: Please contact me for more information.

2. As a noun (a connection):

   • 中文: 这两个事件之间有什么联系吗？
   • 英文: Is there any connection between these two events?

3. Maintaining communication:

   • 中文: 我们毕业后一直保持联系。
   • 英文: We have kept in touch since graduation.

Summary

• "联系" means "to contact" as a verb or "connection" as a noun. It is used to express reaching out to someone or describing a relationship or link between people or things.
• It can refer to initiating contact or maintaining communication over time.

This word is frequently used in both personal and professional contexts to describe communication or relationships.

The word "了解" (liǎojiě) in Chinese means "to understand" or "to know" in English. I

Usage in Sentences

1. To express understanding of a situation or person: "了解" is used when someone becomes aware of or comprehends something in-depth, such as a person’s background, a situation, or information.

   • 例句: 我想了解更多关于这个项目的细节。
   • 英文: I want to understand more about the details of this project.

2. To inquire about something or gain knowledge: It is also used when asking for information or trying to learn more about a topic.

   • 例句: 你了解这个城市的历史吗？
   • 英文: Do you know about the history of this city?

3. Understanding a person’s feelings or thoughts: "了解" can also be used in an interpersonal context to indicate understanding someone's emotions, thoughts, or behaviors.

   • 例句: 他非常了解他的朋友。
   • 英文: He understands his friend very well.

Sentence Structure

• Subject + 了解 + Object: Used to express understanding or knowledge of a specific person, situation, or thing.

Examples

1. Understanding a topic:

   • 中文: 我正在了解这家公司如何运作。
   • 英文: I am learning about how this company operates.

2. Inquiring for more information:

   • 中文: 我们需要了解市场需求。
   • 英文: We need to understand the market demand.

3. Understanding someone's emotions:

   • 中文: 她很了解她的同事。
   • 英文: She understands her colleague well.