Summer Solstice, 夏至

Google Doodles, 2015 夏至.

Summer Solstice 2015 (Northern Hemisphere). 2015 年夏至 (北半球).

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2015 年夏至 (北半球)  https://www.google.com/doodles/summer-solstice-2015-northern-hemisphere?hl=zh-TW

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Summer Solstice 2015, What You Need To Know About The Longest Day Of The Year
http://www.huffingtonpost.co.uk/2015/06/19/summer-solstice-2015_n_7620848.html

(Photo credit GEOFF CADDICK/AFP/Getty Images)
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June Offers More Than The Longest Day Of The Year « WRCH Lite 100.5
http://wrch.cbslocal.com/2015/06/01/june-offers-more-than-the-longest-day-of-the-year/

Summer solstice - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/Summer_solstice
夏至 - 維基百科，自由的百科全書
https://zh.wikipedia.org/wiki/%E5%A4%8F%E8%87%B3

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