In fact, a number of the most effective leadership takes place at the rear of the scenes: coordinating a venture, supporting a colleague, or stepping up throughout a crisis. 但是了解笔刷的特性，并且灵活运用，才是重点。比如用水彩笔调整过后可以用来画过渡。 SAI1:                                      SAI2： https://erickfihih.articlesblogger.com/58791056/saigonlis-secrets