N an aid to navigation, such as a conspicuous object on a shore used as a guide 航线标识 [nautical]
Mark Serreze, director of the American National Snow and Ice Data Center (NSIDC) in Colorado, thinks that sea level rise is going to be a bigger and bigger problem, as we move through the 21st century.
美国国家冰雪数据中心（NSIDC）位于科罗拉多州，其主任马克·塞雷泽（Mark Serreze）认为，随着我们进入21世纪，海平面上升将成为一个越来越大的问题。
That may mark a sea change in social attitudes but it could equally be, pace Mr Schmidt, transient.
这可能标志着社会看法的重大转变，但也完全可能——借施密特所言——是短暂现象。
Mark Smith: When we think of climate change impacts... mostly what people are talking about is drought and floods and storms, and sea level rise, and melting glaciers.
马克·史密斯：人们谈到气候变化的影响时往往会想到水旱灾、暴风雨、海平面上升及冰川融化。
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