zhècì sǔnshī bù dà.

这次 means this time or on this occasion. In Chinese, time expressions often come near the beginning of the sentence, before the main comment.

So the structure is roughly:

这次 + 损失 + 不大
this time + loss + not big

A natural English way to think of it is:

• This time, the loss isn’t big.
• The losses this time aren’t great.

Chinese often puts the time/topic first, then says something about it.

Because 次 here is a measure word / classifier for occasions or times, and demonstratives like 这 and 那 normally go directly before the classifier:

• 这次 = this time / this occasion
• 那次 = that time / that occasion

This is the normal pattern:

这 / 那 + classifier + noun (sometimes omitted)

In 这次, the noun after 次 is omitted because it is understood from context. So 这次 by itself already means this time.

损失 can be either a verb or a noun, depending on context.

In this sentence, it is most naturally a noun:

• 损失 = loss, damage

So 损失不大 means the loss is not big.

As a verb, 损失 can mean to suffer losses, but that is less likely here because the sentence structure fits a noun + adjective pattern very well.

Because 大 is an adjective, and in Chinese, adjectives can directly act as the predicate without 是.

So:

• 损失大 = the loss is big
• 损失不大 = the loss is not big

You do not say:

• 损失是大 ❌

This is a very common difference from English. In English, we need is before an adjective, but Chinese usually does not.

不大 is the normal, natural way to say not big.

Chinese adjectives often work directly after 不:

• 不大 = not big
• 不小 = not small
• 不好 = not good

You could say 不是很大 or 不太大 in some contexts, but they have slightly different tones:

• 不大 = not big
• 不太大 = not very big
• 不是很大 = isn’t very big

In this sentence, 不大 is concise and natural.

Yes, literally 大 means big, but in Chinese it is also commonly used for things like:

• losses
• problems
• pressure
• influence
• damage

So 损失大 means:

• the loss is big
• the damage is serious
• the loss is substantial

In natural English, you might translate 不大 here as:

• not great
• not serious
• not very large

So 大 is broader than just physical size.

Because 不 is normally used for general negation, especially with adjectives and present/future statements.

Here, 大 is an adjective, so:

• 不大 = not big

没有 is more commonly used for:

1. not having

   • 没有钱 = don’t have money

2. not happening / did not

   • 没有去 = did not go

3. comparison with 有

   • 没有那么大 = not that big

So in this sentence, 不大 is the correct and natural choice.

Chinese nouns usually do not show singular/plural the way English does, so 损失 can be understood as:

• the loss
• the losses
• the damage

The exact interpretation depends on context.

So this sentence could mean:

• This time, the loss wasn’t big.
• This time, the losses weren’t large.
• This time, the damage wasn’t serious.

All of these can fit.

A helpful way to see it is:

这次 — time/topic
损失 — subject/topic inside the comment
不大 — predicate

So the sentence is basically:

This time, the loss is not big.

You can also think of it as a topic-comment sentence:

• 这次 = as for this time
• 损失不大 = the loss isn’t big

This topic-first style is very common in Chinese.

Great question. The basic tone of 不 is fourth tone: bù. But there is a common tone change rule:

• When 不 comes before another fourth-tone syllable, it changes to second tone in pronunciation.

Since 大 is dà (fourth tone), 不大 is pronounced:

• bú dà

But dictionaries and vocabulary lists often still write the basic form bù.

So:

• underlying form: 不 bù
• actual pronunciation here: bú dà

Yes. 这一次 and 这次 both mean this time.

• 这次 is shorter and very common in everyday speech.
• 这一次 is a little fuller or slightly more formal/emphatic.

So both are correct:

• 这次损失不大。
• 这一次损失不大。

In most everyday contexts, 这次 sounds more natural and efficient.