Are you still wearing shorts and T-shirts? If you say yes, there's a good reason.

你现在还穿着T恤和短裤吗?如果是，倒也不奇怪。

Planet Earth has definitely experienced its hottest summer since detailed records have been kept, and according to scientists, it might have been the hottest in more than 4,000 years.

今年夏天无疑是自人类详细记录地球气温以来最热的一个夏天，科学家称，这可能是4000多年来最热的夏天。

The meteorological summer of June-July-August in the Northern Hemisphere saw its highest globally averaged temperature since records began in 1880, the National Oceanic and Atmospheric Administration (NOAA) reported.

美国国家海洋和大气管理局(National Oceanic and Atmospheric Administration，NOAA)报告称，今年六、七、八月——北半球气象学意义上的夏天——全球平均气温创下自1880年有气温记录以来的新高。

Seven out of the nine months this year have made their way to the record books. Now that it's fall, September saw its highest temperature on record, for land and ocean surfaces.

今年过去的九个月中，七个月份的气温都创造了历史记录。现在正是北半球的秋天，九月份的陆地和海洋表面温度都创造了高温新纪录。

What do scientists point to for this phenomenon?

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