The polar vortex is a system of wintertime winds.

极地涡旋是冬季风形成的一个风系。

《柯林斯英汉双解大词典》

Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.

雨林有自己完善的系统来确保自身的生存；高大的树木有枝叶形成的树冠层来保护自身，树冠也保护着矮小的植物以及动物不受暴雨、酷暑及强风的侵扰。

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Because the winds at that level are pretty strong, the clouds aligned parallel to the direction of wind flow, in “streets” curving along with the flow of the high-pressure system.

因为该高度层上风力非常强劲，云与风向平行，形成一条条沿高压系统流向的“云街”。

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Tearing up from Antarctica, the trade winds of the Benguela system batter the shoreline night and day.

BBC: The ghostly shore of Namibia��s Skeleton Coast

There are also potential national security repercussions - particularly if, as is likely under the "harmonized" patent system, China winds up being a principal beneficiary of expanded access to, and opportunities for exploitation of, American inventions.

CENTERFORSECURITYPOLICY: Will the GOP Pull a 'Pelosi' on Patent Rights?

"Today forecasters use a comprehensive system (to detect storms) but radar is the foundation because radar detects the circulation of winds that form tornadoes, " Henson said.

CNN: STORY HIGHLIGHTS