How often is there a leap year?
隔多长时间有一次闰年？
为什么要有闰年？
每四年闰年一次。
原来1900不是闰年。
This recurring appointment begins on a leap year.
您的定期约会开始日期是闰月日期。
This recurring appointment begins on a leap year.
此定期约会开始于闰年。
Determines whether the specified year is a leap year.
确定指定的年份是否为闰年。
If you were born in a leap year, you may not get to celebrate your birthday every year.
如果你是润年出生，你有可能不会每年都庆祝到生日。
Production could reach 4,000 a year, a big leap in volume for a racing-car manufacturer.
每年将生产4000辆。对于一个赛车制造商来说，这是个大数量。
Our company is poised to leap into a new market next year.
明年我们公司打算进入新的市场。
A New Year is a time to leap old barriers and make real breakthroughs!
新的一年是重新启程的又一次机会！
Determines whether a specified month in a specified year and era is a leap month.
确定指定纪元年份中的指定月份是否为闰月。
Calculates the leap month for a specified year, or year and era.
计算指定年份或指定纪元年份的闰月。
Calculates the leap month for a specified year.
计算指定纪元年份的闰月。
Calculates the leap month for a specified year and era.
计算指定年份和纪元的闰月。
Calculates the leap month for a specified year and era.
计算指定年份和纪元的闰月。
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