Otherwise the daily mean is perturbed appreciably by the lunar constituents . 否则,日平均值就会明显地受到太阳分潮的干扰。
2.
The above figures represent daily mean values of the weather elements calculated from data in the 30 years from 1961 to 1990 for the 5 - day period centred on the day specified 以上数字表示各天气要素的日平均值,是用1961 - 1990三十年内以指定日期为中位的五日期数据计算的。