丰大，丰盛宏大。
以南方电网2005年丰大运行方式、贵广直流单极运行、天广直流双极运行为例，对东送输电断面的输送功率情况进行了研究。
The cross-section transient transmission limits of west-east and Yunnan power grid are simulated and analyzed in 2005 and 2006 year of Southern China power grid in this paper.
在这个模型下，一大团气体坍缩并在主盘中心形成大量恒星，它们在那里迅速增加着金属丰度。
In this model, a mass of gas collapses and creates lots of stars at the disc's centre, where the stars quickly boost the metallicity.
你越往星系中心走，大质量恒星形成的难度就上升得越快，重元素的丰度也随之下降。
The rate at which massive stars form drops sharply as you venture outward from the Milky Way’s center, and the abundance of heavy elements falls with them.
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