1. This technique was supposed to keep exposure to ground fire to a minimum.

2. At least one was shot down by ground fire, and the others have all gone to seed in Serbia.

3. Given that ground fire resources were definite, the resist capability to different air-attack intensity is studied by simulation means.

4. Two helicopters were also hit by ground fire but both returned to base, the U. S. military said.

5. The helicopter ducked and dived to avoid potential ground fire.

6. Every recon ship sent to this coastal valley fifty miles north of Qui Nhon had been hit by ground fire.

7. Killion jumped over a barracks through a cross-hatching of furious ground fire, and fled to the west.

8. An armed helicopter used esp. for protecting troop transport helicopter against ground fire.

8. try its best to collect and make good sentences.

9. The helicopter assault marked the first known engagement between forces in central Iraq, and many of the American craft were hit by Iraqi ground fire.

10. He can fly higher, meaning that he is at less risk from ground fire.

11. This paper makes a conclusion about the public recreation ground and puts forward some suggestions to strengthen public recreation ground fire protection safety.