timely

1. ADJ If you describe an event as timely, it happens exactly at the moment when it is most useful, effective, or relevant. 适时的[表赞许]

The recent outbreaks of cholera are a timely reminder that this disease is still a serious health hazard. 最近几次爆发的霍乱是一个适时的提醒，该疾病依然是个严重的健康危害。