The severe casualties and the worldwide spread of HIV/AIDS pandemic have posed a tremendous challenge for the global security.

严重的人员伤亡和艾滋病/艾滋病毒的全球传播已经对全球安全构成了一个巨大的挑战。

youdao

Cyber security is a global challenge. No country can stay aloof or immune from it. Maintaining cyber security is the Shared responsibility of the international community.

网络安全是全球性挑战，没有哪个国家能够置身事外、独善其身，维护网络安全是国际社会的共同责任。

youdao

Cyber security is a global challenge, no country can stay aloof or immune from it. Maintaining cyber security is the Shared responsibility of the international community.

网络安全是全球性挑战，没有哪个国家能够置身事外、独善其身，维护网络安全是国际社会的共同责任。

youdao

And last June,says Sittenfeld, the House passed the American Clean Energy and Security Act, the first bill out of either chamber of Congress to directly take on the challenge of global warming.

VOA: standard.2010.02.25