The flier is flying a new-type jet plane on trial.

员正驾驶一架新式气机作试验。

Jets coursed the area daily.

气机每日经那地区。

Iraqi security forces were placed on high alert and American aircraft —unpiloted reconnaissance drones flying low, and fighter jets roaring high above —crossed the capital.

伊拉克安全部队处于高警戒状态，美国空军首都空穿梭，无人驾驶侦察机低空，战斗气机高空呼啸。