huìyuán xūyào huìyuánkǎ.

Because the two instances are doing different jobs:

• 会员 = member
• 会员卡 = membership card

So the second 会员 is not a separate repeated noun by itself; it is part of the compound word 会员卡, literally something like member-card.

This is very common in Chinese: a noun can combine with another noun to form a new word.

It follows a very basic Subject + Verb + Object pattern:

• 会员 = subject
• 需要 = verb
• 会员卡 = object

So structurally it is very close to English:

• Members need membership cards.

This makes it a straightforward beginner sentence.

It can mean either, depending on context.

Chinese nouns usually do not change form for singular vs. plural the way English nouns do. So:

• 会员 can mean a member or members
• 会员卡 can mean a membership card or membership cards

In this sentence, it is most naturally understood as a general statement, like:

• Members need membership cards or
• A member needs a membership card

Chinese often leaves number unspecified unless it really matters.

Because Mandarin does not have articles like English a/an/the.

So a bare noun like 会员 or 会员卡 can often be interpreted from context as:

• a member
• the member
• members
• a membership card
• the membership card
• membership cards

The listener figures it out from the situation.

That is why 会员需要会员卡 sounds complete in Chinese even without extra words.

Because 会员卡 is a set compound word meaning membership card.

Chinese often puts nouns directly together to make a compound noun, without 的. Here:

• 会员卡 = membership card

If you said 会员的卡, that would sound more like the member’s card or the card belonging to the member, which is a different idea.

So:

• 会员卡 = membership card
• 会员的卡 = a member’s card

They are related, but not the same.

Yes. 需要 is a verb meaning to need.

In this sentence, it directly takes an object:

• 需要会员卡 = need a membership card

So you do not need another verb between 需要 and 会员卡.

A very common pattern is:

• A 需要 B = A needs B

Examples:

• 我需要帮助。 = I need help.
• 你需要时间。 = You need time.

Both can sometimes be translated as need, but they are not exactly the same.

• 需要 is more specifically to need / to require
• 要 can mean want, need, be going to, or show intention depending on context

In a sentence like this, 需要 is clearer and more formal/specific:

• 会员需要会员卡。 = Members need membership cards.

If you said 会员要会员卡, it could sound more like:

• members want a membership card or
• members need a membership card

So 需要 is the better choice when you clearly mean need.

Not in this sentence.

When a noun is used as a general object after a verb, you usually do not need a measure word:

• 需要会员卡 = need membership cards / need a membership card

You use a measure word when the noun is counted or specified, for example:

• 一张会员卡 = one membership card
• 那张会员卡 = that membership card

For cards, the common measure word is 张.

• 会员 = huìyuán

  • huì = 4th tone
  • yuán = 2nd tone

• 会员卡 = huìyuánkǎ

  • huì = 4th tone
  • yuán = 2nd tone
  • kǎ = 3rd tone

So the tones stay:

• 会员 → 4th + 2nd
• 会员卡 → 4th + 2nd + 3rd

By itself, it means:

• Members need a membership card

It does not naturally mean:

• To become a member, you need a membership card

For that second meaning, Chinese would usually say something more explicit, such as:

• 成为会员需要会员卡。
• 办会员需要会员卡。

So the original sentence is just a simple statement about members and what they need.

No. Normal Chinese writing usually does not put spaces between words.

So in real writing, this would normally appear as:

• 会员需要会员卡。

The spaces in learning materials are often added to help beginners see the word boundaries:

• 会员 / 需要 / 会员卡

That is just for study convenience.

Yes. Bare nouns in Chinese often sound generic or general.

So 会员需要会员卡 naturally sounds like a rule, policy, or general fact, such as:

• members need membership cards
• a member needs a membership card

This is common in signs, notices, and simple explanations.

If you wanted to make it clearly specific, you could add words like:

• 这个会员需要会员卡。 = This member needs a membership card.
• 会员们需要会员卡。 = The members need membership cards.

But the original sentence is perfectly natural as a general statement.