Amazon founder Jeff Bezos earmarked $1 billion of his $10 billion environmental philanthropy to conservation efforts Monday afternoon, aiming to protect 30 percent of the Earth’s land and sea by 2030 in an effort to prevent mass extinctions.
1B算cheap ( I know, 这坛子2B起步。。。:-) )
10B 不cheap了吧?
难度要100B才算decent?