India has said there is no question of its joining the Nuclear Non-Proliferation Treaty as a nuclear weapon state, saying nuclear weapons are an integral part of its national security.

VOA: standard.2009.09.29

I'm going from V2 to V2 dv - what do you think this integral is? Right, W1 so this is easy part, zero here.

这样才保证了过程的可逆性,下面来计算，路径1的功。

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