1.   Reciprocal motion Reciprocal motion, positive and negative at constant mean velocity, is unnerving, mechanistic and inhuman.

2.   Broader measures turned mostly negative at midafternoon.

3.   It was for Arafat to reject, which he promptly did, making him look negative at a positive moment.

4.   That is why Dole is going negative at the end.

5.   They have to be HIV negative at the outset and pass a physical exam.

6.   As doping abuse grew more sophisticated over the years, athletes used drugs for months preceding competition and were able to test negative at the event itself.

7.   Officials explained their decision by saying that initial testing was negative at one of the postal facilities that the letter had passed through after leaving Brentwood.