The contents of H2S, SO2 and NH3 were significantly increase upon serious pollution of the rivers in late Spring, Summer and early Autumn. During this periods of time, serious acid rain appeared.
实验表明，河网污染最严重的晚春、夏、初秋季节，H2S、SO2、NH3的排放量明显增高，且在这段时间，恰好是酸雨频发、严重的时期。
Every early spring and late autumn the football field is in such a bad condition, especially in rainy periods, that no training is possible.
在每年的早春和晚秋，足球场的地面总是处于一个非常糟糕的状况，特别是在雨季，正常的训练几乎是不可能的。
Every early spring and late autumn the football field is in such a bad condition, especially in rainy periods, that no training is possible.
在每年的早春和晚秋，足球场的地面总是处于一个非常糟糕的状况，特别是在雨季，正常的训练几乎是不可能的。
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