互联网给予了人们前所未有的信息获取渠道。

The Internet has given people ___unprecedented access to information.

核电站事故有造成前所未有的环境破坏的风险。

The accident at the nuclear plant risked causing ___unprecedented environmental damage.

气候变化正在导致全球天气模式发生前所未有的转变。

Climate change is bringing about ___unprecedented shifts in global weather patterns.