Teknologi nuklear itu penting.

Itu is a demonstrative word. It often means that, but in many sentences it can also work a bit like the when English would use a definite noun phrase.

So teknologi nuklear itu can mean:

• that nuclear technology
• the nuclear technology

A key thing for English speakers to notice is that in Malay, itu usually comes after the noun phrase, not before it.

• teknologi itu = that/the technology
• teknologi nuklear itu = that/the nuclear technology

Malay often leaves out the verb to be in simple sentences like this.

So:

• Teknologi nuklear itu penting. = That nuclear technology is important.

There is no need to add a separate word for is in ordinary sentences with adjectives.

This is very normal in Malay:

• Rumah itu besar. = That house is big.
• Dia baik. = He/She is kind.

In Malay, modifiers usually come after the noun they describe.

So:

• teknologi nuklear = nuclear technology
• literally, something like technology nuclear

This is a very common pattern in Malay:

• kereta merah = red car
• tenaga solar = solar energy
• sains moden = modern science

For an English speaker, this is one of the biggest word-order differences to get used to.

Yes. Penting means important, and here it functions as the predicate of the sentence.

The structure is:

• Teknologi nuklear itu = subject
• penting = predicate adjective

So the sentence pattern is basically:

• [subject] + [adjective]

This is why the sentence can be translated as Nuclear technology is important or That nuclear technology is important, depending on context.

Yes, you can.

• Teknologi nuklear penting.

This often sounds more general, like Nuclear technology is important as a broad statement.

Adding itu makes it more specific:

• Teknologi nuklear itu penting. = That/The nuclear technology is important

So the version with itu points to something more definite or already known in the conversation.

Yes.

• Teknologi nuklear ini penting.

That means this nuclear technology is important.

So:

• ini = this
• itu = that

Both of them usually come after the noun phrase in Malay:

• buku ini = this book
• buku itu = that book

Malay nouns usually do not change form for singular vs. plural.

So teknologi nuklear could refer to:

• nuclear technology in general
• a specific instance, depending on context

Usually, context tells you whether the meaning is singular, plural, or generic.

In this sentence, it most naturally sounds like a general or definite idea, not something you need to mark clearly as singular or plural.

Malay does not use articles the way English does.

English often needs:

• a
• an
• the

Malay usually does not.

So:

• teknologi can mean technology, a technology, or the technology, depending on context.
• itu can help make it more definite, which is why teknologi nuklear itu can feel like that/the nuclear technology.

Yes, you may see that, especially in more formal writing, but in everyday Malay it is usually more natural to say simply:

• Teknologi nuklear itu penting.

The word adalah can appear in formal styles, but learners should know that Malay often prefers the shorter version with no extra copula.

So for normal use, the original sentence is perfectly good and very natural.

A simple learner-friendly approximation is:

• nuklear ≈ nook-lee-ar
• penting ≈ pen-ting

A few helpful notes:

• Malay pronunciation is usually more consistent than English spelling.
• Each vowel is usually pronounced clearly.
• The r at the end of nuklear is typically pronounced, unlike in many English accents.

Different regions and speakers may pronounce borrowed words a little differently, but that approximation is a good start.

The basic order is:

• Teknologi nuklear itu = noun phrase / subject
• penting = adjective / predicate

So the full pattern is:

• [noun phrase] + [adjective]

Inside the noun phrase, the order is:

• teknologi = noun
• nuklear = modifier
• itu = demonstrative

So you can think of it as:

• technology + nuclear + that + important

Of course, the natural English translation is That nuclear technology is important or Nuclear technology is important, depending on context.