I have only the vaguest idea what that means. :?
5, It may as well not get such job at all for them as get one but uselessly.
A better metaphor would be: "The situation is a double-edged sword."
6, This problem is equal to a two-edged sword which can be used good or bad equally.
I don't think problem is the right word there. Perhaps issue would fit better there. Say there are a large number of factors.
7, The issue of whether nature or nurture decides the personality of child is, in my opinion, a social rather than a medical problem, for there is a large number of factors involved in this area.
8, I am always amazed to hear that because no evidence now can prove its accuracy.
- I am always amazed to hear that, because there is no known evidence that proves the truth of that claim.
That looks good to me. :D
That looks okay. (Absent any context, I can't be sure what the writer is talking about.)
9, If someone argues that what is discussed above lays too much stress on one’s external environment, then here we can see what a huge influence the situation exerts on one’s inner world.
I would say that education is a type of experience. Do you mean to say that experience changes a person's outlook on things?
10, Education teaches our minds and experience changes our insides.
You will have to rephrase that.
11, Another negative impact, if smoking is still out of control, is its meaning towards the youth
Say which instead of who. Say greater instead of larger.
12, In the event that the number of those young smokers----this generation who should have splendid life in the future----- increases, certainly the possibilities of danger to society would be larger.
That's a little vague. Who is supposed to benefit--the foreigners or the local people?
13, It will be very little beneficial for foreigners communicating with local people, let alone the construction of friendship.