chum change

基本解释

This is a huge change in tone from his predecessor, Jacques Chirac, who treated Mr Putin as an ally and chum.
法国前总统希拉克曾把普金总统当做一个同盟与密友，而萨科齐总统此番言论的口吻却与希拉克的语气有着巨大区别。

The man overseeing this sea change is Michel Bonnefous, a school chum of Bertarelli's who still climbs mountains with the billionaire and skims across Lake Geneva on his powerful 12-meter catamaran ("It's a mountain of sail, " he says, with a touch of awe).
FORBES: Magazine Article
The man overseeing this sea change is Michel Bonnefous, a school chum of Bertarelli's who still climbs mountains with the billionaire and skims across Lake Geneva on his powerful 40-foot catamaran ("It's a mountain of sail, " he says, with a touch of awe).
FORBES: Sailing For the Gold
If Mr Blair thinks that people are being too censorious about his new chum, a few minutes spent on Mr Desmond's main website might change his mind.
ECONOMIST: Bagehot