yèpiàn fāhuáng le, xūyào xiūjiǎn.

叶片 is a more formal or botanical word for a leaf blade or leaf. It often sounds a bit more technical than 叶子, which is the everyday word for leaf.

So:

• 叶子 = everyday, common speech
• 叶片 = more formal, plant-related, descriptive

In a gardening, plant-care, or botanical context, 叶片发黄了 sounds very natural.

发黄 means to turn yellow, to become yellowish, or to show yellowing.

The pattern 发 + color/adjective often means that something is developing that quality:

• 发红 = turn red
• 发白 = turn pale / white
• 发黑 = turn black / dark
• 发黄 = turn yellow

If you said 黄了, that can also mean became yellow, and it is not wrong. But 发黄 often sounds a little more natural when talking about discoloration or a visible change in appearance, especially with things like leaves, paper, teeth, or clothing.

Here, 了 marks a change of state.

So 叶片发黄了 means the leaves have become yellow or are now yellowing, rather than simply stating that they are yellow in general.

Compare:

• 叶片发黄 = the leaves are yellowing / tend to yellow
• 叶片发黄了 = the leaves have turned yellow / there has been a change

This 了 does not necessarily mean past tense in the English sense. It mainly highlights that a new situation has occurred.

It can suggest either, depending on context.

In practice, 发黄了 usually means that the yellowing has become noticeable and is now a current condition. So in English it may be translated as:

• have turned yellow
• are yellowing
• have started to yellow

Chinese often does not force the same tense choice that English does. The important idea is the change in condition.

The sentence does not spell this out fully, but the meaning is understood from context.

Literally, it says:

• 叶片发黄了，需要修剪。
• The leaves have turned yellow; pruning is needed.

In real usage, the thing that needs pruning is usually the plant, or possibly the yellowing leaves. Chinese often leaves out words that are obvious from context.

So English may need to be more explicit than Chinese.

Yes. That is a very common pattern.

需要 + verb means need to do something.

Examples:

• 需要休息 = need to rest
• 需要处理 = need to handle it
• 需要修剪 = need pruning / need to be pruned / need to trim

Chinese does not need an extra word like to before the verb.

In Chinese, 需要 + verb often already implies the passive idea when the context makes it clear.

So:

• 需要修剪 = needs pruning / needs to be pruned

This is more natural than 需要被修剪 in many everyday situations.

Using 被 is possible in some sentences, but here it sounds heavier and less natural. Chinese often prefers the simpler form.

修剪 means to prune, to trim, or to cut back in an orderly or maintenance-related way.

It is commonly used for:

• plants
• branches
• hedges
• hair, in some contexts
• anything being trimmed neatly

In this sentence, it suggests plant care rather than randomly cutting something off. So it sounds appropriate in a gardening context.

If you wanted to emphasize simply removing the yellow leaves, you might also hear things like:

• 剪掉黄叶 = cut off the yellow leaves
• 把黄叶剪掉 = cut off the yellow leaves

But 需要修剪 is a good general plant-care expression.

The comma separates two related parts:

• 叶片发黄了
• 需要修剪

This is very common in Chinese. The first part gives the situation, and the second gives the result, judgment, or needed action.

You can think of it as:

• The leaves have turned yellow, so pruning is needed.

Chinese often links ideas with punctuation and context, even when English might use so, therefore, or a full sentence break.

Yes, absolutely.

That version is more everyday and conversational:

• 叶子发黄了，需要修剪。

It means basically the same thing. The difference is mostly in style:

• 叶片 = more formal / botanical
• 叶子 = more common in daily speech

Both can mean turned yellow, but there is a slight nuance difference.

• 变黄了 = became yellow; a very direct change
• 发黄了 = started showing yellowing / turned yellowish / became discolored

For leaves, both are possible. 发黄了 often sounds especially natural when describing unhealthy yellowing or discoloration.

So:

• 叶片变黄了 = the leaves turned yellow
• 叶片发黄了 = the leaves are yellowing / have become yellowish

Here it is pronounced fā, first tone:

• 发黄 = fāhuáng

This is important because 发 has more than one pronunciation in Mandarin. For example:

• 发黄 = fāhuáng = turn yellow
• 头发 = tóufa = hair, where 发 is pronounced fa in neutral tone

So in this sentence, use fā.