1.   It also represents life itself Where a tree grows, life can exist and this is especially recognized in a hot country.

2.   The new evidence seemed to indicate that life existed on Mars billions of years ago.

3.   Thus intelligent life could not exist in the contracting phase of the universe.

4.   It is possible that life exists on other planets.

5.   Does life exist on Mars?

6.   The article debunks the notion that life exists on Mars.

7.   If then we are so certain that other intelligent life exists in the universe, why have we had no visitors from outer space yet?

8.   Although many people believe that life exists on other planets, this over-the-top movie is worlds away from that serious question.

9.   And some scientists believe primitive life might still exist underground.

10.   Band members had time to mature and not get totally freaked when stardom came, time to realize that life does exist outside the insular music biz.

n. + exist >>共 1655
problem 4.39%
evidence 2.06%
possibility 1.59%
opportunity 1.28%
difference 1.17%
life 1.15%
condition 1.10%
technology 1.04%
system 0.84%
group 0.78%
life + v. >>共 641
be 50.35%
go 4.69%
change 3.06%
begin 2.49%
become 2.41%
have 2.18%
seem 1.81%
take 1.46%
return 1.32%
get 1.31%
exist 0.76%
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