curred in a definite order的意思|示意
美 / /
英 / /
按一定的顺序卷曲
curred in a definite order的网络常见释义
到19世纪初 ...urn of the 19th century geologists had found that rock layers oc- curred in a definite order．（过去完成时）到19世纪初，地质学家已发现岩层有一定的次序。