evolutionary trend 进化趋向 ; 进化趋势
ree evolutionary trend 稀土地球化学演化趋势
long term evolutionary trend 长期演化趋势
The experts aren't sure about the implications of this evolutionary trend.
专家们并没有对这种进化趋势的持有肯定影响。
Their REE abundance increases progressively and their light and heavy REE fractionations also have a general evolutionary trend of becoming more and more marked.
其REE丰度逐渐增高，轻、重稀土分馏程度表现为愈趋显著的总体演化趋势。
Lastly, the evolutionary trend of some characters has been discussed, and an important factor of endangerment has been analyzed.
另外，讨论了有关性状的演化趋势，分析了导致牡丹组植物濒危的可能因素。
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