Lastly, nuclear deterrence and America's extension of it to its Allies may be one reason why great powers have not directly gone to war against each other for 65 years.
最后，核威慑以及美国将其威慑力延伸至同盟国，这些因素使得这两个超级大国在65年间并没有对彼此之间宣战。
The Reproductive Science Center of New England, which does not deal directly with egg donors, said it had gone from no inquiries to now receiving several a month.
并不直接和捐卵者交易的新英格兰生育科学中心表示，捐卵询问件从以前的零增至每月好几例。
Not myself directly. But I am sure I have been very close to situations that could have gone very bad very quickly.
我自己还没遇到过，但是我确信我有几次已经很接近危险情况了。
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