1.   Studies of Olympic athletes, world-class musicians and chess masters show that their common trait is the ability to motivate themselves to pursue harsh training routines.

2.   Although the overdose victims were strangers to one another, some shared common traits and histories.

3.   And as the number of collectors has grown, another common trait has emerged.

4.   Another common trait is a deep admiration for the Zapatista guerrillas demanding better living conditions for Maya Indians in the southern state of Chiapas.

5.   Another common trait is that agents form aggregates.

6.   Biting is the common trait among the Street Sharks, which naturally encourages kids to identify with these ravenous beasts in their own voracious hunger for tacos.

7.   A common trait of the mentally retarded is the effort to hide their disability.

8.   Bork spoke by cell phone while driving in Los Angeles, a common trait among Hollywood producers.

9.   But attempts to explain history in terms of common traits already possessed by the peer groups that confronted these events are seldom illuminating.

10.   But more often he finds that his music and his forestry share common traits.