（光等）快速移动，闪现，浮现 A smile played across/over/on his lips. 他的唇角闪过一丝微笑。 It's best to not do something. Here, we contain the adjective best, but this adjective is connected to no noun. The adjective best is Employed in a copular design Using the dummy pronoun it. This pronoun would not check with any object. https://russelli900odq8.wikilentillas.com/user