天地之气

天地所蕴含的气。“气”是构成一切有形之物的基本材料，充盈流动于天地之间。“天之气”属阳，“地之气”属阴。“天地之气”的运行遵循着阴阳变化的法则。“天地之气”的交互作用推动着昼夜寒暑、风雨雷电的天象变化，也决定了万物的生成与变化。

The Qi (Vital Force) of Heaven and Earth

"The qi (vital force) of heaven and earth" denotes the two types of qi, an element that constitutes all things corporeal and flows between heaven and earth. Their movement follows the law of the change of yin and yang. The interaction between the two types of qi leads to the day-and-night cycle, the succession of the seasons, and the occurrence of such heavenly phenomena as wind, rain, thunder, and lightning. The interaction also determines how all the things are generated and changed.

引例

天地之气，莫大于和。和者，阴阳调，日夜分，而生物。（《淮南子》）（天地之气的变化，最重要的就是调和。调和，就是阴阳平衡，昼夜更替，衍生万物。）

The change in the qi of heaven and that of earth prioritizes harmonization, which refers to the reconciliation between yin and yang, the differentiation between day and night, and then the generation of all the things. (Huainanzi)