二十八天

今年仲春份的天数是二十八天。

The number of days in February this year is28 .

月亮绕地球旋转一周需要二十八天。

The whole journey of the moon round the earth takes twenty-eight days .

我们通常在混凝土灌注后二十八天测定其强度。

We usually measure the strength of concrete at28 days after it has been cast .

二十八天龄方块强度

Cube strength of 28 days

上诉必须在收到最初决定通知之日起二十八天内提出。

The appeal must be lodged within twenty-eight days of the date of notification of the initial decision .

“生命节律说”是所谓关于人的体力、情绪、智力分别具有二十三天、二十八天、三十三天节奏变化的理论。

" Life Circle " is a theory which deals with the periodicity of physical strength ,(?) on and intelligence of human beings .

不错，福克先生所预定的八十天期限现在已经用去了五十二天，他只剩下二十八天的时间了。

Mr Fogg had , it is true , exhausted fifty-two of the eighty days in which he was to complete the tour , and there were only twenty-eight left .

三十天，是九月，四月六月十一月；剩下都是三十一，唯一例外是十月；二十八天是平年，二十九天是闰年。

Thirty days hath september , april , june , and november ; all the rest have thirty-one , Excepting February alone , and that has twenty-eight days clear and twenty-nine in each leap year .