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。

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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。

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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。

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Indexes have morphed from their market-matching beta roots to complex trading- and securities-weighting strategies that are supposed to add excess returns, known as alpha.

FORBES: No Free Lunch from Alternative Indexes

The roots of stagnation are complex.

ECONOMIST: A tale of two Mexicos

Whether filming hippos in the clear water of Mzima Spring, flamingo chicks in a dried-out soda lake or the complex layers of life within a massive baobab tree, the Roots always let their subjects tell their own stories making astonishing discoveries along the way.

ECONOMIST: Animals in Africa