Thanks for replying me.

My "students must sacrifice some of their health to study" means, for example, many university students work till 4 a.m. When they are tired, they don't rest but drink 4 cups of coffee.

You are right, technology makes human strong. But grasping technology requires hard work, while working too hard doesn't promote human health, as I have said above. If human has evolved to be adapted to being strong, working hard should be good for human health.

But is there any evidence that can prove that the parent knows this or doesn't know this?

Is what I've said in the words below the title right (the grey words)? This is my personal opinion and I want your response for what I've said.

That's what I've forgotten to correct. I copied a sentence what a user said in another page where the topic "Should a teacher hit students" was raised.

The "be slapped" ought to be changed to "be punished".

You haven't answered the question. Can "Rome is a city in Latinia" prove it was not invented by Romans? Was it invented by Romans or other places in Latinia?

No, Greek alphabet is not derived from Latin alphabet. Latin alphabet is derived from Greek alphabet.(My native language is not English. I may misunderstand some of the meanings.)

No, Greek alphabet is not derived from Latin alphabet. Latin alphabet is derived from Greek alphabet.

Sorry for asking again. Since it was not invented by Romans, which nation had invented it?

Since it was not invented by Romans, which nation had invented it?