本期内容：

The global climate-change talks in Paris began with a stream of speeches, policy initiatives and behind-the-scenesdiplomacy. François Hollande linked the fight against terrorism (“a world free of terror”) to that against global warming (“a planet free of catastrophes”).Barack Obama and Bill Gates launched a multi-billion-dollar clean-technology research programme. And Mr Obama again told Vladimir Putin that Bashar al-Assad must sooner or later leave power in Syria.

词义解析:

A stream of: 一系列的

Initiative：倡议

Diplomacy: 外交

Catastrophe: 灾难