system tracts的用法和樣例：
例句
- Therefore, hydrocarbon source rocks formed in the early highstand system tract have the best hydrocarbon potential.
因此早期高位體系域中的烴源岩有較好的生烴潛力。 - A model for the Lower Tertiary framework and sequence system tract of Jiyang subbasin was established with the high_resolution sequence stratigraphy.
建立了濟陽坳陷下第三系高精度層序地層格架和層序體系域的構成模式。
