The newer ice, experts say, is less resistant to melting during the summer months.
科学家们说，越新的冰川越难抵抗夏季消融。
With further melting, refreezing, and increased weight from newer snowfall above, the snow reaches a granular recrystallized stage intermediate between flakes and ice known as firn.
随着进一步的融化、再结冰，以及上方新的降雪增加的重量，这些雪变成再次结晶阶段的颗粒状中间物，介于小薄片与冰块之间，被称作万年雪。
In September 2007, Airbus issued a "service bulletin" suggesting that airlines replace the AA pitots with a newer model, the BA, which was said to work better in ice.
2007年9月，空客公司宣布，一个“技术服务公告”建议将所有的AA皮托管更换成新型的BA型皮托管，BA型皮托管被认为能更好的应对结冰的问题。
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