In Spring, tiny flowers called catkins blossom, then develop into acorns, which form inside a cap called a cupule.

在春天，一种叫做柔荑花科花的小花内部一个被状物的小帽子会发育成为橡树果。

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Protect ends with capped self-locking washers incorporating a spring steel insert to ensure permanent retention of cap in exposed locations.

对外露端部的保护，可采用自锁螺帽加以弹簧垫，以确保螺帽持续牢固的预紧力。

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The utility model relates to a door-handle component capable of changing rotation directions, comprising a handle, a cover cap, a spring, and a clamping ring.

一种可改变旋转方向的门把手组件，包含有把手、罩盖、弹簧和卡圈；

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We felt sorry for Larry, who worried the curved, finger-smudged bill of his Cubs cap endlessly that spring, but we also thought it was pretty obvious that he should have kept his pecker in his pants.

NPR: Excerpt: 'Then We Came to the End'

In the spring and summer of recent years, the polar ice cap has receded more quickly and more dramatically.

NPR: Oceanographer Sees Real Effects of Climate Change

The seasonal increase results from tons of carbon dioxide, which had been frozen into a southern winter ice cap, returning into the atmosphere as southern spring turns to summer.

ENGADGET: Curiosity rover finds radiation levels on Mars are safe for humans