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Before a sperm cell matures, the histones in genomic DNA must transform into another form automatically, so that the genetic materials from the male are stored in the sperm head in a safer and more condensed way, explained Liu Mofang, the lead researcher on the team at the Institute of Biochemistry and Cell Biology, a branch of the Chinese Academy of Sciences' Shanghai Institutes for Biological Sciences.
Beijing Daxing International Airport, set to start test runs at the end of September 2019, will combine the use of solar energy, earth energy with traditional energy sources, according to the Beijing Municipal Commission of Development and Reform.
Beijing and Washington have agreed to suspend any increase in tariffs after a meeting between President Xi Jinping and Trump on the sidelines of the G20 Summit in Buenos Aires, Argentina, on Dec 1.
Because of those challenges, a government statement said, the highway port would be closed from Tuesday until April 13.
Beijing opposes the travel act and has urged the US to adhere to the one-China policy, and it initiated negotiations on the issue to urge the US to adhere to the three joint communiques that lay out the two countries' mutual understanding.
来源：资阳报