Unprotected skin on the arms and legs may need about 15 minutes of sun exposure a day in spring, summer and fall to make enough of the vitamin.

春季，夏季，秋季时没有衣物覆盖的手臂和腿部每天可能晒个15分钟就可以获得足够的维他命d。

youdao

In Labor Day, may our labor bring everyone the fruits of spring. I wish you a happy family.

劳动节愿我们的劳动带给大家春天的回报，祝您全家幸福愉快。

youdao

On a chilly day last spring, a few dozen developers of children's apps for phones and tablets gathered at an old beach resort in Monterey, California, to show off their games.

去年春天，在一个寒冷的日子里，几十名基于手机和平板电脑的儿童应用程序开发者相聚在加利福尼亚州蒙特雷（Monterey, California）的一个古老海滩度假胜地，展示他们的游戏。

youdao

"Next spring, I'm going to release a book set in the modern day world but a fantasy based on Egyptian mythology, bringing all those old Egyptian gods back to life."

VOA: special.2009.10.12

Recognizing that the market does not top out into a correction on the same day in the spring every year, nor does it launch into a rally on the same day in the fall each year, in 1999 I introduced a similar strategy that has been one of the portfolios in my newsletter since.

FORBES: Sell In May, Great, But Go Away For How Long?

But I came away from my day in Bolton with a spring in my step.

BBC: iSchool - can tech really deliver education?

Other soldiers heard about the proxy law, and William and Bridey did three more weddings on a single day in the spring, and three in the summer after they graduated.

NEWYORKER: The Proxy Marriage