The dynamic models of upright root, level root, compound root and general root are summarized according to foreign study actuality of forest root system model.

根据近年来国外林木根系模型研究现状综述了垂直根型，水平根型，复合根型和具有一般性的根系动态模型。

youdao

Meanwhile, the Dodd-Frank approach does nothing to address the most obvious root causes of damage to the financial system--conflict of interest due to the issuer-pays model and staleness of ratings.

FORBES