tā shì bóshì.

她 means she / her in writing, while 他 usually means he / him.

A very important point: 她 and 他 are both pronounced tā in standard Mandarin. So in speech, you usually cannot hear the difference. The difference is mainly visible in writing.

• 她 = female
• 他 = male
• 它 = it

博士 usually means someone with a doctoral degree, or PhD.

So 她是博士 means She is a PhD / She has a doctoral degree / She is a doctorate holder.

It usually does not mean medical doctor. For a medical doctor, Chinese more commonly uses 医生.

So:

• 她是博士。 = She is a PhD / She has a doctorate.
• 她是医生。 = She is a doctor (medical doctor).

Mandarin does not have articles like a, an, and the in the same way English does.

So 她是博士 is completely natural even though there is no separate word for a.

Chinese often expresses this kind of sentence more directly:

• 她是博士。 = She is a PhD / She is a doctor (in the academic sense)

You do not need to translate every English word one by one.

是 is the verb most often used for to be when you are identifying or classifying someone or something.

In 她是博士:

• 她 = she
• 是 = is
• 博士 = PhD / doctorate holder

So the pattern is:

Subject + 是 + noun

This is a very common structure for saying what someone is:

• 她是老师。 = She is a teacher.
• 他是学生。 = He is a student.
• 她是博士。 = She is a PhD / doctorate holder.

Yes, you can, but it is often less natural in a simple statement like this.

For jobs, identities, and titles, Chinese often prefers:

• 她是博士。

Adding 一个 is possible in some contexts, especially when you want to emphasize one person among others or make the noun feel more countable:

• 她是一个博士，也是一个教授。

But in a basic identification sentence, 她是博士 is the more standard and natural version.

The pronunciation is:

• 她 = tā (1st tone)
• 是 = shì (4th tone)
• 博 = bó (2nd tone)
• 士 = shì (4th tone)

So the full sentence is:

tā shì bóshì

A few pronunciation tips:

• tā: high and level tone
• shì: falling tone
• bó: rising tone
• the sh sound in shì is a Mandarin retroflex sound, not exactly the same as English sh

Because they are two different characters with two different meanings:

• 是 = to be
• 士 = scholar / specialist, and here it is part of 博士

They just happen to have the same pronunciation: shì.

This is very common in Chinese. Many different characters can sound the same but mean different things. You understand which one it is from the character and the context.

Yes, in this sentence the word order is very similar to English:

• 她 = she
• 是 = is
• 博士 = doctor / PhD

So:

她是博士。
= She is a PhD.

This is a straightforward Subject + Verb + Noun sentence.

No. In normal Chinese writing, this sentence is written without spaces:

她是博士。

Spaces are often added in beginner materials to make the words easier to see. But standard written Chinese does not usually put spaces between words.

Yes. 博士 can also be used as a title in some contexts, especially academic ones.

For example:

• 王博士 = Dr. Wang

In that case, it works more like an honorific title. But in 她是博士, it is simply saying what she is.

Sometimes yes, if the context already makes it clear who you are talking about.

For example, in conversation:

• 是博士。
  = Is a PhD / She’s a PhD / He’s a PhD

But as a full, clear sentence, especially for learners, 她是博士。 is better.

Chinese often drops subjects when they are obvious from context, more often than English does.