A leap second is an extra second added to the last day of the month of March, June, October or December which means that the last minute in the day for that month has more than 60 seconds.

闰秒是向3、6、10或12月的最后一天添加的1秒，这意味着该月份的最后一天的最后一分钟不止60秒。

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We planned the day down to the last detail.

我们极为详细地安排了这一天的日程。

《牛津词典》

When you're busy all day the last thing you want to do is spend hours slaving over a hot stove.

当你忙碌了一整天后，你最不愿意做的事就是花好几个钟头在灼热的火炉边辛苦地劳作。

《柯林斯英汉双解大词典》

On the last day of April, the Union troop boats began carrying soldiers to the east side of the river.

VOA: special.2009.11.19

And, as I reminded you at the end of last day, the only reason I am doing this for you right now is I want to elucidate the principles.

就像我上次课的最后跟你们说过的那样，我现在给你们讲这些,仅仅是我想把原理阐释清楚。

麻省理工公开课 - 固态化学导论课程节选

So there are two electron configurations in the n equals one shell, if we follow according to the selection rules that we spelled out last day.

如果根据上次课,我们阐明的原子光谱选择定则，我们就会知道在n等于1的那一层,有两种电子图像构型。

麻省理工公开课 - 固态化学导论课程节选

As a matter of fact, we were rewriting that script or writing--trying to finish the script almost to the last day of shooting.

NPR: A Robert Wise Reprise

"It's always gone to the last day of the season before, we've always been in there fighting and haven't been adrift as badly as we are now, " he said.

BBC: Survival is unlikely - Finnigan

And so to the very last day of this remarkable summer of sport.

BBC: The media and the Olympic Games