At the beginning of a cycle the jet stream is found, like sunspots, in mid-latitudes.

在一个活动周期开始的时候，就可以找到高速气流，像中纬度地区的太阳黑子。

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In the first stage the jet stream lies well to the north and it takes a general west-east direction.

在第一阶段急流远在其北且一般为由西向东的方向。

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Up near the jet stream above New York, the wind power density can reach 16 kilowatts per square meter.

在纽约上空的射流层（对流层顶）附近，风能密度可达16千瓦每平方米。

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In the past, pilots thought airplanes moving up and down in the jet stream caused such turbulence.

MSN: Blame gravity waves for turbulence - Technology & science - Science - LiveScience | NBC News

Later in the summer, the jet stream moved back to its normal position and the usual rainfall service was resumed.

BBC: Scotland's summer of two halves

The jet stream consists of strong winds about 10 miles above the Earth that control storm paths and mark boundaries between cooler and warmer air.

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