到达机场早。加强保安措施，可能意味着较长线的安全检查。
Arrive at the airport early. Enhanced security measures may mean longer lines at security checkpoints.
遇袭后美国加强保安措施及善用情报，至今保障了美国本土安全。
But the tough security measures introduced in the aftermath of the attacks - and better use of intelligence - have, so far, kept America safe.
他们目前承受着加强机场保安措施的巨大压力。
They are now under a great deal of pressure to tighten their airport security.
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