我们期待，2018年的世界多一些开放、少一些封闭。世界经济新一轮增长的萌芽需要各国共同呵护。中国改革开放40年来的经验表明，向世界敞开胸怀是实现发展繁荣的必由之路。我们将坚持对外开放的基本国策，坚持互利共赢的开放战略。积极参与全球治理体系改革和建设，推动经济全球化朝着更加开放、包容、普惠、平衡、共赢方向发展。深入推进“一带一路”建设，落实首届高峰论坛成果，启动筹备第二届高峰论坛，推动形成全面开放新格局。办好博鳌亚洲论坛、上海合作组织峰会、中非合作论坛峰会和中国国际进口博览会等主场外交活动，助推开放发展的时代潮流。

我翻：We expect that the world of 2018 will be more open, less blocker. The new growing economy in the worldwide need support from other countries. China's Opening Up and Reform Policy proved that it is an indispensable way to develop prosperity with open arms. We insist on this basic policy and win-win strategy. we will actively participate in reforming and  building the global system of governance, develop the global economy with more open, tolerate, balance and win-win. 

官翻：In 2018, we look forward to a world of greater openness and less isolation. The green shoots in the new round of global growth must be nurtured by all countries. What China has learnt in its 40 years of reform and opening up is that prosperity only comes to those who embrace the world with open arms. China will remain committed to opening up as a fundamental policy and a mutually beneficial strategy. We will stay actively engaged in reforming and developing the global governance system to make economic globalization more open, inclusive and balanced so that its benefits can be shared by all. We will work on the Belt and Road Initiative by implementing deliverables of the first Forum and starting preparations for the second one. This way, we can break new ground in opening up. We will host a number of events like the annual conference of the Boao Forum for Asia, the Summit of the Shanghai Cooperation Organization, the Summit of the Forum on China-Africa Cooperation, and the China International Import Expo to add momentum to the trend of openness and development. 

总结：

1. 这一段的难点在于无法确定主语。

2. 各种短语简直要命，无从下手。

3. 想要表达清楚，句子结构需要好好架构。