1.  As a sailing ship has a certain destination, everyone has his or her very own goals in lives, which they would like to try their best to attain.

2.  As a sailing ship has a certain destination, so we must have a definite goal in life.

3.  As a sailing ship has a certain destination, we must have a definite goal in life.

4.  As a sailing ship has a certain destination , every person has a definite goal in life.

5.  As a sailing ship has a certain destination, most people have a definite goal in life.