Operatorul de distribuție răspunde repede.

Because -ul is the Romanian definite article for a masculine singular noun.
So:

• operator = operator, an operator
• operatorul = the operator

Unlike English, Romanian usually puts the definite article at the end of the noun, not before it.

de distribuție literally means of distribution or for distribution. Romanian often uses de + noun to describe the type or function of something.

So operator de distribuție is a technical or administrative way to say distribution operator.

This pattern is very common in Romanian, for example:

• rețea de distribuție = distribution network
• sistem de control = control system
• centru de informare = information center

Because after de in this kind of classifying phrase, Romanian usually uses the basic noun form:

• de distribuție

This is not the same as using a true genitive ending. English speakers often expect something like of the distribution, but Romanian does not normally build this phrase that way.

So:

• operator de distribuție = distribution operator
• operatorul de distribuție = the distribution operator

Using distribuției would create a different structure and would sound more specific or less natural here.

răspunde is the 3rd person singular present tense of the verb a răspunde, meaning to answer or to respond.

Here it agrees with the singular subject operatorul.

A few present-tense forms are:

• eu răspund = I respond
• tu răspunzi = you respond
• el/ea răspunde = he/she responds

So in this sentence, răspunde means responds.

No. Romanian usually does not need a subject pronoun if the subject is already clear.

In this sentence, the subject is explicitly stated:

• Operatorul de distribuție răspunde repede.

So adding el would usually be unnecessary.

Romanian can even omit the subject completely if context makes it clear:

• Răspunde repede. = He/She/It responds quickly.

In this sentence, răspunde is being used without stating what the operator is responding to. It simply means responds quickly.

When Romanian does mention the target, the structure can change depending on what follows:

• îi răspunde clientului = he/she responds to the customer
• răspunde la mesaj = he/she responds to the message

So a răspunde does not always work exactly like English to respond to. Sometimes Romanian uses the dative, and sometimes it uses la.

repede is an adverb, meaning quickly or fast.

It describes how the action happens:

• răspunde repede = responds quickly

As an adverb, repede does not change for gender or number.

You can also compare it:

• repede = quickly
• mai repede = more quickly, faster
• foarte repede = very quickly

That is the most neutral and natural position here:

• răspunde repede

Romanian often puts adverbs after the verb, especially in simple statements.

Other word orders are possible for emphasis, but they are less neutral. For a learner, the safest pattern is:

• subject + verb + adverb

So Operatorul de distribuție răspunde repede is the standard, natural order.

Yes, Romanian word order is more flexible than English, but not every alternative sounds equally natural.

The neutral version is:

• Operatorul de distribuție răspunde repede.

You might also hear marked or emphatic versions in special contexts, but for everyday use this standard order is best.

So as a learner, it is a good idea to treat this sentence as:

• Subject + Verb + Adverb

Two important Romanian letters here are:

• ă as in răspunde
• ț as in distribuție

Their pronunciation is roughly:

• ă = a short neutral vowel, similar to the a in sofa
• ț = ts, like the end of cats

A rough pronunciation of the whole sentence is:

• o-pe-ra-TO-rul de dis-tri-bu-TSI-e răs-PUN-de re-PE-de

The stress is roughly on:

• operaTORul
• distribuȚIe
• răsPUNde
• rePEde

You would say:

• Un operator de distribuție răspunde repede.

Here:

• un operator = a/an operator
• operatorul = the operator

So the main change is from the definite form to the indefinite form.

This is a very useful contrast:

• un operator de distribuție = a distribution operator
• operatorul de distribuție = the distribution operator