On your second question, Security Council Summit on Nuclear Non - proliferation and Disarmament is the first of its kind to be held and is of great significance.

关于你提的第二个问题，安理会核不扩散和核裁军峰会是安理会有史以来首次专门就核不扩散和核裁军等问题举行峰会，意义重大。

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After a period of proliferation during the second trimester, neurons are also "pruned," meaning that they undergo a planned cell death.

在增殖期过后第二个三个月里，神经元也被“削减”，这意味着它们经历了一个有计划的细胞死亡过程。

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On your second question, Security Council Summit on Nuclear Non-proliferation and Disarmament is the first of its kind to be held and is of great significance.

关于你提的第二个问题，安理会核不扩散和核裁军峰会是安理会有史以来首次专门就核不扩散和核裁军等问题举行峰会，意义重大。

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Second, the proliferation of media gives campaigners more options for getting out their message, but makes it harder to be heard above the hubbub.

ECONOMIST: The mid-term mud starts to fly

The second catalyst is the proliferation of smart devices, both in the government workplace and in the constituent community.

FORBES: Not Your Father's Government

Second, achieving after 2010 a more robust implementation of the Nuclear Non-Proliferation Treaty with the aim of accelerating disarmament among possessor states, preventing proliferation and ultimately freeing the world from nuclear weapons.

BBC: In full: Brown security statement