Dàn hợp xướng luyện thanh rồi hát lại điệp khúc.

Dàn hợp xướng means choir.

• hợp xướng = choral singing / choir
• dàn is a noun often used for an organized musical group or arranged set, like an ensemble

So dàn hợp xướng is a natural way to say the choir. Here, dàn is part of the noun phrase, not a separate classifier in the usual counting sense.

Luyện thanh means to vocalize, to warm up the voice, or to do vocal exercises.

It is made up of:

• luyện = to train, practice
• thanh = voice/sound tone

So luyện thanh is the kind of practice singers do before singing.

Vietnamese commonly places verbs in sequence when actions happen one after another.

Here:

• luyện thanh = warm up the voice
• rồi = then / after that
• hát lại = sing again / repeat singing

So the structure is:

[subject] + [action 1] + rồi + [action 2]

That is very natural in Vietnamese for describing a sequence of actions.

Here, rồi means then, after that, or and then.

In Vietnamese, rồi can have different uses depending on context. Two common ones are:

1. Sequencing actions

   • ăn rồi đi = eat and then go

2. Completed/already

   • Tôi ăn rồi = I already ate

In your sentence, it is the first use: it connects two actions in order.

Hát lại means sing again or repeat singing.

The word lại often means again when it follows a verb.

Examples:

• đọc lại = read again
• viết lại = write again
• nghe lại = listen again

So:

• hát = sing
• hát lại = sing again

Điệp khúc means chorus or refrain in a song.

So hát lại điệp khúc means sing the chorus again.

Be careful not to confuse dàn hợp xướng and điệp khúc:

• dàn hợp xướng = choir (the group of singers)
• điệp khúc = chorus/refrain (the repeated part of a song)

Because Vietnamese word order usually puts the verb before its object.

So:

• hát lại điệp khúc = sing again + the chorus

This is normal Vietnamese syntax:

• đọc sách = read a book
• uống nước = drink water
• hát điệp khúc = sing the chorus

English often works the same way here, but learners sometimes hesitate because of the extra word lại.

Vietnamese does not use articles like a, an, and the the way English does.

So:

• dàn hợp xướng can mean a choir or the choir
• điệp khúc can mean a chorus or the chorus

The exact meaning depends on context. In this sentence, English naturally uses the choir and the chorus, but Vietnamese does not need separate words for that.

Yes, sometimes it could be omitted, but keeping it makes the sequence clearer.

Compare:

• Dàn hợp xướng luyện thanh rồi hát lại điệp khúc.
  = The choir warmed up and then sang the chorus again.

• Dàn hợp xướng luyện thanh, hát lại điệp khúc.
  = The choir warmed up, sang the chorus again.

The version with rồi more clearly emphasizes one action followed by another.

Usually hát lại điệp khúc is the more natural order.

Why?

• lại usually comes right after the verb when it means again
• so hát lại forms a tight unit: sing again

Then the object comes after:

• hát lại điệp khúc

While hát điệp khúc lại may sometimes be understood, it is less natural in this neutral sentence.

A very literal breakdown would be:

• Dàn hợp xướng = choir
• luyện thanh = practice/warm up the voice
• rồi = then
• hát lại = sing again
• điệp khúc = chorus

So, word-for-word:

The choir warmed up their voices, then sang the chorus again.

That is both quite literal and good natural English.

Both relate to singing, but they are not used in the same way.

• hát is the everyday verb to sing
• xướng is more literary/formal and appears in compounds like hợp xướng

So you would say:

• hát một bài hát = sing a song

But:

• hợp xướng = choral singing / choir

In this sentence, the action verb is still hát, not xướng.

A natural rhythm would be:

Dàn hợp xướng / luyện thanh / rồi hát lại / điệp khúc.

These chunks match the meaning:

1. Dàn hợp xướng — the choir
2. luyện thanh — did vocal warm-ups
3. rồi hát lại — then sang again
4. điệp khúc — the chorus

Thinking in chunks like this can make Vietnamese sentences easier to process.