When the hesperornis leave their rocky ledges to dive for fish, the halisaurus are down below, waiting for an opportunity to ambush them.是什么意思_When the hesperornis leave their rocky ledges to dive for fish, the halisaurus are down below, waiting for an opportunity to ambush them.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句