n.闰秒

leap seconds───闰秒

neap seasons───小潮季节

arcsecond───角秒

femtosecond───n.飞秒，毫微微秒

nanosecond───n.纳秒；十亿分之一秒

neap season───小潮季节

to second───到秒

zeptosecond───飞秒

femtoseconds───飞秒

But the leap second is a newcomer.───不过闰秒是个新事物。

Enjoy New Year's Eve's leap second.───享受除夕夜的闰秒吧。

Enjoy New Year's Eve's leap second.───那就好好享受除夕夜的闰秒吧.

The last time a leap second was added was in the dying moments of 2005.───上一次的闰秒发生在2005年的最后时刻.

Deciding when leap second is the responsibility of the International Earth RotationReference Systems Service.───国际地球自转服务组织负责决定何时加减闰秒.

Deciding whether and when a leap second is needed falls to an international organisation called the International Earth Rotation and Reference Systems Service (IERS).

Enjoy New Year's Eve's leap second.

The last time a leap second was added was in the dying moments of 2005.

This year, the world's timekeepers will add its 24 th leap second since 1972.

Deciding when leap second is the responsibility of the International Earth RotationReference Systems Service.

The first leap second was added on June 30, 1972, according to NIST.

But the leap second is a newcomer.

Just when I opened my MSN, a news came out which said, "2008 is the longest year of this century, it has 366 days and 1 second". 2008 is such a special year which has a leap year and a leap second.