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在弦理論的景觀中，可能有10^500種不同的真空狀態(tài)，每種狀態(tài)對(duì)應(yīng)一個(gè)不同的可能宇宙。

The solution of the problem of life is seen in the vanishing of the problem.

The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.