七日的英文：
seventh

Overseas tour: Seven days around Japan, a country of flowering Cherry.
境外旅游:烂漫樱花日本七日游。

septan fever
【医】七日热

Le Duc tho cabled me in a similar vein on October 27
十月二十七日，黎德寿以同样基调给我来电。

On June 27, the President voted the second Supplemental Appropriations Act with the "Cambodia rider".
六月二十七日，总统否决了带有“柬埔塞附加条款”的第二补充拨款法案。

On July 27th, a low-flying Russian-made Su-27 fighter jet crashed into terrified people, causing heavy casualties
二十七日，一架低空飞行的俄制苏恺二十七型喷射机坠入惊恐的观众群中，造成惨重的伤亡。

the seventh heaven
极乐

The Seventh Evening of the Seventh Moon is the Lover Festival in China.
七月七（七夕）是中国的情人节。

It has just entered the seventh edition.
它刚出版了第七版。

Libra is the seventh of the zodiac signs.
天秤座是黄道十二宫的第七宫。

Saturday is the seventh day in a week.
星期六是一周的第七天。