Around xx tonnes of ghost net was collected for a half-day clearance exercise.
是次半日的清理行动中约清除了两吨鬼网。
Health officials recommend that all seniors get clearance from their physicians-particularly if they have a history of heart problems-before they start an exercise program.
健康官员建议每个老年人、特别是有心脏病史的人，在从事运动之前应该由医生开个清单。
The exercise simulated an emergency rescue flight at takeoff clearance during take-off because of interruption of fault plane, plane off the runway.
这次应急救援演练模拟一架出港航班在起飞过程中由于飞机故障中断起飞，飞机冲出跑道。
The exercise simulated an emergency rescue flight at takeoff clearance during take-off because of interruption of fault plane, plane off the runway.
这次应急救援演练模拟一架出港航班在起飞过程中由于飞机故障中断起飞，飞机冲出跑道。
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