undergrown是什么意思,undergrown怎么读,
英式发音:[ˌʌndəˈɡrəʊn] 美式发音:[ˌʌndəˈɡrəʊn]
1.Lowstand System Tracts of Early and Metaphse Jurassic Period was undergrown, of which Transgressive Systems Tract and Highstand Systems Tract made up.
早、中侏罗世低位体系域不发育,由海进体系域与高位体系域两部分组成。