应对全球挑战 中国将发挥关键作用

no longer不再, 已不, 不复, 再也不
例句：He was long a famous musician, but he plays no longer.
他成为有名的音乐家已很久了, 但他现在不演奏了。

2. Gurria added there are at least three crucial actors that can make a significant contribution to the construction of this new inclusive and effective global governance architecture.

make a contribution to捐赠;作出贡献
例句：Einstein make a great contribution to science.
爱因斯坦对科学作出了伟大的贡献。

3. But the great potential of this contribution depends on our capacity to understand each other and to learn from each other to address common challenges and meet shared objectives.

depend on随…而定; 取决于
例句：Whether the game will be played depends on the weather.
比赛是否举行要看天气而定。
learn from向…学习; 从…获得〔吸取〕
例句：She learned everything from me.
她什么都是向我学的。

4. It is a forum of countries committed to democracy and the market economy, providing a platform to compare policy experiences, seek answers to common problems, identify good practices, and co-ordinate domestic and international policies of its members.

commit to对…作出承诺, 承担义务, 担负责任; 使(自己)致力于…
例句：He has committed himself to the cause of education.
他已决心献身教育事业。