As a new type of research reactor with new fuel element and core structure, no experience can be used for the design and implementation of the power regulating system.
某新型研究堆采用新型燃料元件和堆芯结构，反应堆的控制特性缺乏基本数据，功率调节系统的设计无可借鉴经验。
Calcium is not only a necessary element, but also the second messenger of signal out of cell and physiological and biochemical reaction in cell, regulating the growth and development of fruit trees.
钙不仅是果树生长发育所必需的一种大量元素，更重要的是作为胞外信号和胞内生理生化反应的第二信使，参与果树生长和发育的调控。
Ri was recognized as a regulating element on formation of new blood vessels in embryo developing, wound healing, and tumor occurring.
RI被认为是胚胎发育、创伤愈合及肿瘤发生中新血管形成的一种调节因子。
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