The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
Two greeting pines with twining roots and complex knags are waving to welcome your coming. May you live a long life and be young forever, like the pines.
这是两棵迎客松，它们盘根错节，摆动枝叶向你们招手致意，欢迎大家的到来，愿你们像松柏常青、永葆青春年华。
Classic algorithm is slow and complex for solving the maximum module of the roots of polynomials.
传统多项式根最大模求解算法的求解效率低、计算复杂。
This thesis deals with the research of algorithm which is applied to finding roots of complex functional equation.
基于常用的求解复函数方程根的算法，进行研究探讨。
The next significant question was how to predict the number of positive, negative and complex roots.
次一个重要的问题是怎样预知正根，负根和复根的个数。
The consideration of damping force leads to a fact that there exist complex roots to the characteristic equation for the structures.
考虑阻尼力后，结构的特征方程应有复数根，因而通常用于求解多项式方程实数根的二分法不再适用。
The consideration of damping force leads to a fact that there exist complex roots to the characteristic equation for the structures.
考虑阻尼力后，结构的特征方程应有复数根，因而通常用于求解多项式方程实数根的二分法不再适用。
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