Should parents continue to finance their children after the children are 18? Explain your opinion.

Of course, parents have to finance their children till they graduated their university.
>> Of course, parents have to finance their children until they graduate from their university.
It is impossible to earn a money when a student study in the university.

>> It is impossible to earn money when a student is still studying in the university.

Because he has no time to spare to get a extra part time job.

>> Because he has no time to spare to get a part time job.

But what he has to do is constantly building his capacity and deal with his issue; studying hard in his major and get a good grade from it.
>> But what he has to do is constantly build his capacity and deal with his issues; studying hard in his major and get a good grade from it.
Futhermore, lots of activities the university provides cost huge money such as exchange student program.

>>Furthermore, there are a lot of activities that the university provides that cost huge money such as exchange student program. 

Even though it spends a lot of money, it can be a great opportunity for student individual.

>> Even though it costs a lot of money, it can be a great opportunity for individual student /student\'s individuality. 

He can acquire languages from a experience in different countries.
>> He can acquire languages from experiences in different countries.
And essentially what i want to say is the younger day is more precious than older day.

>> And essentially what I want to say is the younger days are more precious than the older days.

or

>> And essentially, what I what to point out is, our younger days are more precious than the older days.

Young people can achieve something important compared to old people. And their brain literally works well in that time.

>> Correct

They must take advantage from their parents when they are young.

>> Do you mean: They must take advantage learning from their parents while they are still young?