opportune
/ˈɔpətju:n; ?@ -tu:n; ˌɑpɚ`tun/ adj
(fml 文)
1 (of time) suitable or favourable for a purpose （指时间）合适的, 恰好的, 适宜的
arrive at an opportune moment 来得正好.
2 (of an action or event) done or coming at the right time （指行动或事情）适时的, 及时的
an opportune remark, statement, intervention, etc 合时宜的言词、 言语、 干预等
Your arrival was most opportune. 你来得真是时候.