În ceea ce privește echilibrul biologic, protejăm bacteriile benefice.

It is an idiomatic expression meaning regarding, as for, with respect to, or when it comes to.

So:

• În ceea ce privește echilibrul biologic = Regarding biological balance / As for biological balance

Even though the words can be broken down literally, learners should really treat În ceea ce privește as a set phrase.

It is best learned as a chunk.

Literally, it is built from:

• în = in
• ceea ce = what / that which
• privește = concerns / regards

So the literal structure is something like in that which concerns..., but that is not how you would naturally translate it into English. In real use, it simply means regarding or as far as ... is concerned.

Because privește belongs to the fixed expression în ceea ce privește, not to the main clause.

The sentence has two parts:

• În ceea ce privește echilibrul biologic = introductory phrase
• protejăm bacteriile benefice = main clause, we protect the beneficial bacteria

So the actual action of the sentence is in protejăm.
Privește is just part of the formal expression meaning regarding.

Also, privește is 3rd person singular because it comes from a privi used in the sense to concern / to regard.

Ceea ce usually means what or that which.

It is a very common Romanian structure, especially in more formal language. In this sentence, it helps build the expression în ceea ce privește.

A rough way to think about it is:

• ceea = that thing
• ce = which / that

Together: that which or what

You do not need to translate it word-for-word every time; in this sentence, it is just part of the fixed phrase.

Because echilibrul is the definite form: the balance.

• echilibru = balance
• echilibrul = the balance

Romanian often uses the definite article in places where English may use no article or may sound more general. With abstract or technical notions, echilibrul biologic can sound very natural.

So even if English says simply biological balance, Romanian may prefer echilibrul biologic.

The comma separates the introductory phrase from the main clause.

Structure:

• În ceea ce privește echilibrul biologic, = introductory frame
• protejăm bacteriile benefice. = main statement

This is similar to English punctuation in sentences like:

• As for biological balance, we protect the beneficial bacteria.

The comma helps show that the first part sets the topic.

Because in Romanian, the normal position of most descriptive adjectives is after the noun.

So:

• bacteriile benefice = the beneficial bacteria

This is more neutral and standard than putting the adjective first.

English usually says beneficial bacteria, but Romanian more naturally says bacteria beneficial in terms of word order, with proper agreement:

• noun first: bacteriile
• adjective after: benefice

Benefice agrees with bacteriile in gender and number.

The noun is:

• bacterie = singular, feminine
• bacterii = plural
• bacteriile = the bacteria, plural definite

So the adjective must be feminine plural:

• masculine singular: benefic
• feminine singular: benefică
• masculine plural: benefici
• feminine plural: benefice

That is why the sentence has bacteriile benefice.

Protejăm means we protect.

The ending -ăm tells you that the subject is we. Because Romanian verb endings already show the subject clearly, the pronoun noi is often omitted.

So:

• protejăm = we protect
• noi protejăm = we protect too, but with extra emphasis on we

In this sentence, leaving out noi is completely normal.

Yes. Bacteriile is the direct object of protejăm.

You can tell from the sentence structure:

• protejăm = we protect
• what do we protect? bacteriile benefice

So:

• subject = understood we
• verb = protejăm
• direct object = bacteriile benefice

Also, in Romanian, the plural definite form bacteriile looks the same for nominative and accusative, so the role is understood from the verb and sentence structure.

Yes, a privi often means to look at.

For example:

• Privesc cerul. = I am looking at the sky.

But it can also mean to concern, to regard, or to relate to, especially in more formal expressions.

That is the meaning it has in:

• în ceea ce privește = regarding / as far as ... is concerned

So in this sentence, it does not mean literal looking.

Yes, it sounds fairly formal or informative, especially because of În ceea ce privește.

That phrase is common in:

• formal writing
• presentations
• informational texts
• technical or medical language

A simpler alternative might be:

• Despre echilibrul biologic, protejăm bacteriile benefice.
• În privința echilibrului biologic, protejăm bacteriile benefice.

But the original sentence is perfectly natural in a formal or semi-formal context.