autumn ice

i plant trees frequently in the spring, swims in the summer, sweeps clear the fallen leaf in the autumn, ice-skates in the winter.

我经常在春天种树，在夏天游泳，在秋天清扫落叶，在冬天滑冰。

Further study shows that autumn heavy ( light) sea-ice extent is followed by low ( high) winter temperature in most of China.

进一步分析发现秋季该海区海冰面积偏大（偏小），相应冬季中国大部地区气温明显偏低（偏高）。

Sea ice melts in summer. Without ice for a platform they cannot hunt seals, their main prey-and so they fast, eating almost nothing until ice forms in autumn.

夏季，海上冰雪消融，没有冰面作为平台，它们就无法捕食它们最主要的食物来源－海豹，所以，它们几乎不吃什么东西，禁食直到秋季冰块再次成型。