adj.同位素的；合痕的

How could such a change in isotopic composition have come about? 同位素的組成有這樣的變化，究竟是如何發(fā)生的？

Conversely,the isotopic characteristics will be well explained by assuming that the UHPM occurred in the crust instead in the upper mantle. 相反，如果認為大別山超高壓變質(zhì)巖就在地殼內(nèi)形成，則大別山超高壓變質(zhì)巖同位素的所有特征就很好解釋了。

adv.同位素地(合痕地)