沿着美国东海岸，最南边的冰川运动被大量的沙子和终碛石的漂流沉积物（形成了长岛和科德角）所记录下来。
Along the east coast of the United States, the southernmost advance of this ice is recorded by the enormous sand and drift deposits of the terminal moraines that form Long Island and Cape Cod.
祖博克煞费苦心描绘的这幅图景是如此地栩栩如生，但它也只不过反映了沉闷乏味的苏联式生活的冰川一角。
The picture Mr Zubok paints so painstakingly is vivid. Yet it is only a tiny corner of the dreary canvas of Soviet life.
我们猜测，这只是冰川一角———对于神经疾病和痴呆症发生上，我们仍对很多东西并不了解。
Our suspicion is that this is just the tip of the iceberg — there’s so much that we still don’t know about neural disease and the genesis of dementia.
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