据许多科学家说。
According to a recent report by the Federation of American Scientists, possession of MANPADS continues to be a threat in many parts of the world.
据美国科学家联合会的最新报告,MANPADS仍然是世界许多地区的威胁武器。
According to scientists, this gingko tree with many descendants is the oldest of its kind in existence in the world.
据科学工作者推断,这株繁衍了很多子孙后代的野银杏为世界银杏之祖。
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