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Anyone who turned or turns 20 between April 2, 2017 and April 1, 2018 was invited by his or her hometown's authorities for a congratulatory ceremony, followed by a visit to the local shrine and a full-on night out with friends.

Any form of precipitation with a PH level below 5.6 is called acid rain. Precipitation with a PH level of under 4.5 is regarded as severe acid rain. Acid rain is made up of water droplets that are unusually acidic because of atmospheric pollution, most notably the excessive amounts of sulfur and nitrogen released by cars and industrial processes.

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Annual rankings by the Genetic Engineering & Biotechnology News, a US-based industry journal, showed Amgen was ranked first among biopharmaceutical companies in the world for 2019 for the second time. It is one of the world's largest independent biotechnology companies, with its headquarters located in Thousand Oaks, California.

Another positive trend is investors increasingly focusing on high technology, structural upgrading and capacity cooperation.