越来越多的岩溶问题影响铁路隧道安全，岩溶发育的不规律性给探测、预报带来了困难。
More and more problems of karst influence railway tunnel safety, the irregular character of karst brings difficulties to survey.
伦敦不是座冷漠的城市，也不是特别热情的一个，我欣赏它的无规律性，欣赏它不断推陈出新的观念和生活方式，欣赏人们遇到陌生事物时的不惊不讶。
London is not a passive city or a particularly welcoming one, but I like the lack of rules, the quick turnover of ideas and styles and the cool indifference people have to strangeness.
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