英語(yǔ)每日一句

The first calendar *to fix these days on definite dates of the year *was the solar calendar，*which had 365 days in a year and —every four years— a “l(fā)eap-year” with one extra day.

solar calendar 日歷

leap year 閏年

fix...... on.. 固定

to引導(dǎo)的動(dòng)詞不定修飾the first calendar

which 非限定從