fùyìnjiàn wánquán qīngchu.

In Mandarin, adjectives can act as the predicate by themselves, so you often do not need a verb like to be.

So:

• 复印件完全清楚。 = The photocopy is completely clear.

Here, 清楚 works like the main descriptive predicate of the sentence.

复印件 means a photocopy, copy, or photocopied document.

It breaks down like this:

• 复印 = to photocopy
• 件 = item / piece / document-like unit

So 复印件 is literally something like a photocopied item/document.

完全 means completely, entirely, or totally.

In this sentence, it modifies 清楚, so:

• 完全清楚 = completely clear

So the whole sentence means:

• The photocopy is completely clear.

Yes, it is grammatical and understandable.

However, in everyday speech, native speakers may more often say things like:

• 复印件很清楚。 = The photocopy is very clear.
• 复印件非常清楚。 = The photocopy is extremely clear.
• 复印件十分清楚。 = The photocopy is very clear.

完全清楚 can sound a bit stronger or more formal, like perfectly clear or totally clear.

A very common pattern in Mandarin is:

• noun + 很
  • adjective

For example:

• 复印件很清楚。

Learners are often taught this early because 很 often appears before predicate adjectives.

But 很 is not always required. Other degree words can also be used, such as:

• 非常清楚
• 十分清楚
• 完全清楚

In this sentence, 完全 already fills that role, so 很 is unnecessary.

Yes. 清楚 has a few related uses.

It can describe something visually clear:

• 字很清楚。 = The writing is clear.

It can also describe understanding:

• 我听清楚了。 = I heard it clearly.
• 我不太清楚。 = I’m not very clear about it / I don’t know clearly.

In 复印件完全清楚, the meaning is the visual one: the photocopy is clear/legible.

It is talking about visual clarity—that the photocopy is easy to read or see clearly.

Because the subject is 复印件 (photocopy), 清楚 here naturally means something like:

• clear
• legible
• easy to make out

It does not mean that all the information is included. For that idea, Chinese would usually use other words.

Yes. 清晰 is also common for visual clarity.

Compare:

• 清楚 = clear; can be used for vision, hearing, understanding, etc.
• 清晰 = clear, distinct, sharply defined; often a bit more formal or technical

So these are both possible:

• 复印件很清楚。
• 复印件很清晰。

For a photocopy, both work. 清楚 is especially common in everyday speech.

Not exactly in this sentence.

In 复印件, 件 is part of the word itself. It is not acting as a separate measure word here.

So you should treat 复印件 as one vocabulary item meaning photocopy.

If you wanted to count them, you might say something like:

• 一份复印件 = one photocopy
• 两份复印件 = two photocopies

Here, 份 is the measure word for the whole document/copy.

Yes, it can be a full sentence in Chinese.

Mandarin often allows short, direct descriptive sentences, especially when the context is obvious.

• 复印件完全清楚。

This is a complete statement: topic/subject + description.

In English, we must say The photocopy is completely clear, but Chinese can express that without an extra linking verb.

It is written qīngchu.

The first syllable has a clear first tone:

• qīng

The second syllable is often pronounced in a light tone:

• chu

So it sounds roughly like qīng-chu.

That is why you may see it written as qīngchu rather than qīngchǔ in some teaching materials. The neutral tone is very common in this word.

Not directly.

• 完全 = completely / entirely
• 都 = all / both / already in some contexts

So:

• 复印件完全清楚。 = The photocopy is completely clear.

But 都 usually needs a plural idea or a different structure. So 复印件都清楚 would not mean the same thing unless you were talking about multiple copies and had context for all of them.

A few very natural options are:

• 复印件很清楚。 = The photocopy is very clear.
• 复印件非常清楚。 = The photocopy is extremely clear.
• 这份复印件很清楚。 = This photocopy is very clear.
• 复印得很清楚。 = It was photocopied very clearly.

If you are just describing how readable the copy is, 很清楚 is probably the most everyday choice.