Maple tree produces a kind of peculiar sap each spring, which can produce a sweet and delicious syrup.

每年春天，枫树会产生一种独特的叶汁，可以用来制作甘甜可口的糖浆。

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Each spring, thousands of walruses return to the Walrus Islands in northern Bristol Bay to feed, rest, and sometimes die.

每年春天，成千上万只海象返回到布里斯托尔湾北部的海象群岛觅食、休憩、有时死亡。

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And it's from low-flying airplanes each spring that pilots sow the rice crop by tossing seeds from 900-kilo bags into the wind.

VOA: standard.2010.06.17

Each year it's dramatized by the cycle of the seasons, And at a certain time of the year it seems that The forces of darkness and chaos are prevailing but each spring, Once again, cosmic order and life return.

每年这冲突都由季节的轮回戏剧性地体现出来，仿佛是每年都有一个时期,弥散着黑暗和混乱的势力，可是每当春天来临，宇庙的秩序又恢复了。

耶鲁公开课 - 旧约导论课程节选

So just very briefly, the courses-- each student takes four courses in the fall, four courses in the spring and then the capstone course.

简介一下课程-,每位学生秋季上四门课，春季上四门课，然后是总结性课程。

哈佛公开课 - 幸福课课程节选

Though small in number, the fish thrived in the Mississippi, gorging on plankton and reproducing each spring.

FORBES: Lucky Catch

Each spring they get into a messy fight trying to write a new one.

ECONOMIST: Canada

Heading out to the range or the course each spring is like a living growth chart.

WSJ: How Mom Plays the Game | Golf Journal