By default , both firefox and safari will try to identify known fraudulent sites using public blacklists .
默认情况下，firefox和safari都会利用自己的黑名单来识别那些已知的欺诈网站。
Most spam filtering involves blacklists in which email from addresses on the list is rejected or filtered .
大多数垃圾邮件过滤涉及到黑名单，来自该名单上的地址的电子邮件将被拒绝或过滤掉。
Blacklists are used to combat spam in a very specific way .
黑名单是用来对付垃圾邮件是很具体途径.
Second , browsers could offer tools that resemble ad blockers or spam blacklists that would allow non-expert users to avoid connections to illegitimate sites that seem to have been validated .
But whereas robeson 's activism ran headlong into early cold-war paranoia , blacklists and mccarthyism , mr belafonte was luckier : his career rose more or less in tandem with the american civil-rights movement .
