the way in which something, especially paint, is put on to a surface with a brush

The artist painted this picture using tiny/vigorous/swirling brushstrokes (= movements of the brush). 艺术家在画这幅作品时笔法细腻／遒劲／富于变化。

the way in which a plan or idea is explained

She described the project in very broad brushstrokes (= without any details). 她笼统地描述了一下那个项目。