1. Capillarity is the ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.
（毛细作用是液体在狭窄空间中无需辅助，甚至能够逆向外部力量如重力而流动的能力。）

2. Capillarity is an important factor in plant physiology as it helps transport water and nutrients from the roots to other parts of the plant.
（毛细作用在植物生理学中是一个重要因素，它有助于将水和养分从根部运输到植物的其他部分。）