For instance, stratus clouds-those unlovable, featureless sprawls that give us our overcast skies, happen when moisture-bearing updrafts lack the oomph to break through a level of more stable air above, and instead spread out, like smoke hitting a ceiling.

比如，要是携带水汽的上升气流无法突破上面比较稳定的一层空气，就会像烟碰到了天花板那样向外展开，于是就形成了层云一那种不大讨人喜欢，毫无特色，弄得天空阴沉沉的云层。

Number five, a warmer atmosphere will also lead to more stable air which is likely to decrease the overall number of tropical cyclones that form because the convection current needs cooler air high in the atmosphere to develop.

第五，更温暖的大气层也会导致更稳定的空气，这可能会减少形成的热带气旋的总数，因为对流需要大气层高处较冷的空气才能发展。