一些公司声称，已建立具有“被动安全（passively safe）”特性的核电站，发生故障时无须人为或机械干预即能自动停止，它依靠物理学定律来遏制失控反应。
Several claim to build “passively safe” plants that need no human or mechanical intervention to close after a fault, but rely on the laws of physics to contain runaway reactions.
日本人为什么像从没看过电视一样疯狂购买电视呢？是电视具有一种新的科技特性？还是某种社会新潮流？
So why are the Japanese buying TVs like they've never seen TVs before? A new tech feature? A new society trend of some kind?
黄土暗穴的稳定性不仅与黄土自身的工程地质特性有关，而且还与各种自然条件及人为因素有关。
The stability of loess hidden holes not only relates to the engineering geology characteristics, but to all kinds of natural conditions and human factors.
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