jìshùrényuán zhèngzài liánjiē wǎngxiàn.

技术人员 means technical personnel, technical staff, or technician(s) depending on context.

Breakdown:

• 技术 = technology / technical skill
• 人员 = personnel / staff member(s)

In this sentence, 技术人员 is the person doing the action, so it is the subject.

人员 sounds more formal and job-related than 人.

Compare:

• 技术人员 = technical staff / technician(s)
• 技术人 = not natural in standard Mandarin

So 人员 is commonly used in workplace, official, or professional contexts when talking about categories of workers.

By itself, 技术人员 can be:

• singular: a technician
• plural: technical staff / technicians

Chinese nouns usually do not change form for singular vs. plural the way English nouns do. The exact meaning depends on context.

If you want to make it clearer, you could say:

• 一名技术人员 = one technician
• 几名技术人员 = several technicians

In this sentence, without more context, it could be understood as either singular or plural, though English often translates it as singular if one person is being described.

正在 shows that an action is in progress right now.

So:

• 连接 = connect / connecting
• 正在连接 = is connecting / is in the middle of connecting

It is similar to the English idea of the progressive: is doing.

正在 usually goes before the verb.

Pattern:

• Subject + 正在 + Verb + Object

So here:

• 技术人员 + 正在 + 连接 + 网线

This is the normal placement.

Yes. That is also natural.

Both can mark an ongoing action:

• 技术人员正在连接网线
• 技术人员在连接网线

General difference:

• 正在 often feels a little more explicit or formal about right now
• 在 + verb is very common in everyday speech

You can also hear:

• 技术人员正在连接网线。
• 技术人员在连网线。

All of these can work depending on style and context.

Yes, you can say:

• 技术人员连接网线。

But the meaning changes slightly.

Without 正在, the sentence may sound more like:

• a general statement
• a description of what the technician does
• or a simple statement of the action, without emphasizing that it is happening right now

With 正在, the sentence clearly means the action is happening at this moment.

连接 means to connect / link and sounds fairly neutral or technical.

In this sentence, 连接网线 is natural because connecting a cable is a somewhat technical action.

Comparison:

• 连接 = connect, link; a common formal/technical verb
• 接 = attach, connect, receive; very common, but broader in meaning
• 连 = connect, join; also common, often more informal or shorter

For a network cable, you may hear:

• 连接网线 = connect the network cable
• 接网线 = hook up the network cable
• 连上网线 = connect/plug in the cable successfully

So 连接 is a good textbook and standard choice here.

网线 literally means network cable.

Breakdown:

• 网 = net / network
• 线 = wire / cable / line

In everyday use, 网线 usually refers to an Ethernet cable or internet/network cable.

Chinese basic word order is usually:

• Subject + Time/Aspect/Adverb + Verb + Object

So here:

• 技术人员 = subject
• 正在 = aspect marker showing ongoing action
• 连接 = verb
• 网线 = object

This is one of the most common and basic Chinese sentence patterns.

Because Chinese does not need a verb like is for this kind of action sentence.

In English:

• The technician is connecting the cable.

In Chinese:

• 技术人员正在连接网线。

The progressive idea comes from 正在, not from a separate verb like is.

Also, 是 is not used before normal action verbs in this way.
So 技术人员是正在连接网线 would be wrong in ordinary Chinese.

Not in this sentence as written.

When you are making a general statement or describing someone already understood from context, you can just say:

• 技术人员正在连接网线。

But if you want to say a technician, you usually add a number + measure word:

• 一名技术人员正在连接网线。
• 一个技术人员正在连接网线。

Both are possible, but 名 sounds more appropriate for people in a formal or neutral context.

Yes, often you can.

• 技术员 = technician
• 技术人员 = technical personnel / technical staff / technician(s)

Difference:

• 技术员 is usually more specific as a job title or individual worker
• 技术人员 is broader and slightly more formal

So:

• 技术员正在连接网线。 = very natural
• 技术人员正在连接网线。 = also natural, slightly more formal/broad

Usually, 正在 is the better choice here.

Why:

• 正在 emphasizes that the action is currently happening
• 着 often emphasizes a continuous state or manner, not always the active process itself

So:

• 技术人员正在连接网线。 = The technician is in the middle of connecting the cable.

A sentence with 着 would not be the most natural way to express this exact idea.

It sounds neutral to slightly formal.

Reasons:

• 技术人员 is a bit formal/professional
• 连接 is a standard technical verb
• 正在 is common and neutral

In more casual spoken Mandarin, people might shorten it to something like:

• 技术员在接网线。
• 他在连网线。

But the original sentence is perfectly natural and standard.

Because in Chinese, the object usually comes after the verb.

So:

• 连接 = connect
• 网线 = network cable

Together:

• 连接网线 = connect the network cable

This is a standard verb + object structure.

Not necessarily.

连接 by itself describes the action of connecting. It does not automatically tell you whether the action is finished.

So:

• 正在连接网线 = is connecting the cable, still in progress

If you want to emphasize successful completion, Chinese often adds a result element, for example:

• 连上网线了 = has connected the cable / got the cable connected

So the original sentence focuses on the process, not the result.