Warning: file_put_contents(/www/wwwroot/ppbbu/laei.cn/cache/2e3d175a39ad4db7bd371887687a7321.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/laei.cn/index.php on line 58 mysticete例句_mysticete英汉例句_mysticete双解例句_按摩法牛津词典
The origin of the mysticete's low-frequency hearing is far murkier, even though the fossil evidence of that group now dates back to as early as 34 million years ago. 雖然就化石記錄來看，須鯨在3400萬年前（漸新世初期）就出現了，可是牠們的低頻聽覺起源仍然混沌不明。