n. a long whipstitch or overhand stitch overlying an edge to prevent raveling
n. a cast that falls beyond the intended spot
v. make overcast or cloudy
a. 阴天的, 阴暗的, 愁闷的
1. The sky was overcast, so we decided to stay indoors.
天空阴云密布，所以我们决定呆在室内。
2. An overcast day can sometimes make the colors of nature look more vibrant.
阴天有时会让大自然的色彩看起来更加鲜艳。
3. We canceled the picnic because the weather was overcast and rainy.
我们取消了野餐，因为天气阴沉且下雨。