He worked out that a year should be 365.24281481 days long and created the Daming Calendar.

他计算出一年应该是365.24281481天，并创造了《大明历》。

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This resulted in a year that is 365 days long.

从此，一年就按365天计算。

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One of our concerns before sailing was that we'd find the days long.

我们启程之前的一个担忧就是会觉得日子太长而难熬。

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During those long summer days, The Luck was carried up the mountain to the place where the men were digging for gold.

VOA: special.2009.06.06

One that seems to be in fashion these days, although you never know how long the fashion lasts, is: internal uprisings that somehow these monarchical areas, when life got tough, the people must have risen up against them.

有一个理论现在很流行,虽然不知道流行了多久,那就是认为,这些王国中起义的内部原因是,当民生困苦时,人们就必然奋起反抗

耶鲁公开课 - 古希腊历史简介课程节选

In the old days, it took a long time to count the votes from the November elections.

VOA: special.2009.01.19

The trip was about 10 days long, and I made sure it was a culture marathon.

WSJ: Marcus Samuelsson on Traveling to Japan to Eat Fugu | Traveler's Tale

Also, since the tournaments are just three days long, they usually have two pro-ams, Wednesday and Thursday, allowing twice as many amateurs to participate.

FORBES: Love Golf? You Need To Play In a Pro-Am ASAP

After poring over the data, engineers and physicists noted a recurring pattern 33 days long that affected the decay rates of the various radioactive substances.

FORBES: Radioactive Decay Rates May Not Be Constant After All