well timed
adjective uk/ˌwel ˈtaɪmd/ us/ˌwel ˈtaɪmd/
及时的;适时的;不早不晚的
happening or caused to happen at a suitable or effective time
[ before noun ] A well-timed joke stopped the disagreement developing into something more serious. 一个及时的笑话使这场争论没有变得更加剑拔弩张。
Synonym: timely