1. pledge to 保证；承诺
Sarkozy even pledged to walk out of the summit if it failed to produce serious regulatory commitments.
萨科奇甚至发誓如果没有达成重要的规制承诺就退出峰会7]iFeGxnfEobAJm~GUCX。

2. an unprecedented opportunity 千载难逢的机会
E-commerce development has brought an unprecedented opportunity to China's economic development.
电子商务的发展给我国的经济发展带来了一个前所未有的机遇eM,R41H%*D[ZWv+i#g。

3. sales pitch 推销
He talked a mile-a-minute and was well into his sales pitch before I had any idea what it was that he was selling.
他说起话来就像连珠炮oEKZ5&GKH,oqd[。他一上来就滔滔不绝地推销，可我连他到底卖的是什么都没有弄明白^-qsYd^P_H2^~。

4. along with 伴随
Along with the movement of low turn, teenager sitting in front of middle-aged seems to be covered with a layer of shadow.
伴随着乐章的低转，坐在少年前方的中年仿佛被披上了一层阴影3e0HZ)LLvc0uBAHrZs。