gāofēngqī de yǒuyǎngyùndòng kè qǔxiāo le.

高峰期 literally means peak period or rush hour / busy time.

In this sentence, it describes the time when the class takes place. So 高峰期的有氧运动课 means something like:

• the aerobics class during peak hours
• the peak-time aerobics class

Exactly how you translate it depends on context, but the basic idea is that the class is associated with the busiest time period.

Here, 的 links 高峰期 to the noun phrase that follows it.

Structure:

• 高峰期 = peak period
• 的 = linking particle
• 有氧运动课 = aerobics class

So 高峰期的有氧运动课 literally works like:

• the aerobics class of the peak period
• more naturally: the aerobics class held during peak hours

A useful way to think about 的 is that it often turns the word before it into a modifier of the noun after it.

It most naturally describes the whole noun phrase 有氧运动课.

So the meaning is not usually:

• peak-period aerobic exercise as a special type of exercise

It is more naturally:

• the aerobics class that is scheduled in the peak period

In other words, 高峰期的 is modifying 课, through the whole phrase 有氧运动课.

有氧运动 means aerobic exercise or cardio exercise.

课 means class or lesson.

So 有氧运动课 is:

• an aerobics class
• an aerobic exercise class
• a cardio class

In everyday English, aerobics class is often the most natural translation.

Chinese often puts the main action after the topic or subject.

Here the structure is:

• 高峰期的有氧运动课 = the peak-time aerobics class
• 取消了 = was canceled / has been canceled

So the sentence follows a very normal Chinese pattern:

• [thing] + [what happened to it]

This is similar to:

• 会议取消了。 = The meeting was canceled.
• 课程改了。 = The course was changed.

The 了 here shows a new situation or completed change of state.

取消了 tells us that the cancellation has now happened. It is not just talking about the dictionary meaning cancel; it marks the event as having occurred.

Compare:

• 取消 = to cancel
• 取消了 = canceled / has been canceled

In this sentence, 了 is very important because it signals that the class is now in the state of being canceled.

In Chinese, it can often cover both, depending on context.

Literally, Chinese does not always mark the passive the way English does. So:

• 课取消了 literally looks like the class canceled
• but in natural English, it usually means the class was canceled

Chinese often leaves out the agent if it is unknown, unimportant, or obvious. So the sentence does not say who canceled the class.

If you wanted to mention the agent, you could say something like:

• 学校取消了高峰期的有氧运动课。
  The school canceled the peak-time aerobics class.

Chinese does not use articles like the and a the way English does.

So 课 can mean:

• a class
• the class
• classes

The exact meaning depends on context.

In this sentence, because it refers to a specific class that both speaker and listener likely know about, English naturally uses the:

• The peak-time aerobics class was canceled.

Usually, 高峰期的有氧运动课 is the safer and more standard form.

Without 的, the phrase becomes harder to parse clearly:

• 高峰期有氧运动课取消了

A native speaker might still understand it in context, but 的 makes the relationship much clearer: it marks 高峰期 as modifying the class.

So for learners, keeping 的 here is a good idea.

No. Here 课 is a noun meaning class / lesson.

This is different from cases where 课 can appear in educational contexts as part of expressions like:

• 一节课 = one class period

In this sentence:

• 有氧运动课 = aerobics class

So 课 is the head noun of the phrase, not a measure word.

Yes. In many cases, 取消了 can be translated as either:

• was canceled
• has been canceled

The difference depends on English context more than on Chinese grammar.

If the speaker is simply reporting what happened, was canceled is natural. If the speaker is emphasizing the current result or recent update, has been canceled is also natural.

So both can be good translations.

A simple way to break it down is:

• 高峰期的 = peak-time / during peak hours
• 有氧运动课 = aerobics class
• 取消了 = was canceled / has been canceled

Pattern:

• [modifier + noun] + verb + 了

More abstractly:

• [thing/topic] + [change/event happened]

This is a very common Chinese sentence pattern, especially when reporting updates or changes.