These crawls are part of an effort to archive pages as they are created and archive the pages that they refer to. That way, as the pages that are referenced are changed or taken from the web, a link to the version that was live when the page was written will be preserved.
Then the Internet Archive hopes that references to these archived pages will be put in place of a link that would be otherwise be broken, or a companion link to allow people to see what was originally intended by a page's authors.
川普他期盼美國「再度偉大」(make America great again)之後,國威即足以服人,對亞太「軍力安全無堪慮,經貿利多滾滾來」。但亞太目前的實情,與他的願景實在相距太遠,中國大陸的崛起,幾乎處處與美國針鋒相對;美國傳統的盟邦,不少依違於二者之間,已在觀望;川普放棄TPP,但對於中國大陸的區域甚至全球發展佈局,自「一帶一路」到亞投行及RCEP,都還看不出有應對之策。