it never rains but it pours

(proverb)misfortunes or difficult situations tend to follow each other in rapid succession or to arrive all at the same time

(諺)禍不單行

pour cold water on

pour it on

(N. Amer. informal)progress or work quickly or with all one's energy

(北美，非正式)賣力干

pour oil on troubled waters

try to settle a disagreement or dispute with words intended to placate or pacify those involved

平息風波，勸解不和

pour scorn on