老年人口增长给我们的提出了严重的挑战。
The increase of the aging population has posed a serious challenge to our country.
在高科技战争中，日益严重的光电威胁尤其是光电制导武器的威胁对舰船的生存提出了严峻的挑战。
The increasingly serious photoelectric threat, especially the threat from the photoelectric guided weapon brings forward the severe challenge to the survival of naval vessel in the high-tech war.
WANET网络具有严重的资源限制特点：如带宽限制、能量限制等，同时这些资源提供的浮动性很大，这就给WANET网络的路由策略提出了严峻的挑战。
Resource in WANET is seriously limited, such as bandwidth constraints and energy constraints etc. This presents a serious challenge to design routing strategies for WANET.
WANET网络具有严重的资源限制特点：如带宽限制、能量限制等，同时这些资源提供的浮动性很大，这就给WANET网络的路由策略提出了严峻的挑战。
Resource in WANET is seriously limited, such as bandwidth constraints and energy constraints etc. This presents a serious challenge to design routing strategies for WANET.
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