擅闯白宫国宴除需要一些勇气外,显然还要突破重重安全防线。
Crashing a state dinner at the White House apparently takes a security breakdown as well as some kind of nerve.
铁路车站安检工作是查危防爆安全防线上的重要一环。
The security check at railway stations is an important section in the line of defence against dangers and explosion.
IDS为支持无线访问的网络提供了一个道额外的安全防线。
IDS offers an extra safe defense-line for supporting wireless network.
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