1. pledge to 保證；承諾
Sarkozy even pledged to walk out of the summit if it failed to produce serious regulatory commitments.
薩科奇甚至發誓如果沒有達成重要的規制承諾就退出峰會7]iFeGxnfEobAJm~GUCX。

2. an unprecedented opportunity 千載難逢的機會
E-commerce development has brought an unprecedented opportunity to China's economic development.
電子商務的發展給我國的經濟發展帶來了一個前所未有的機遇eM,R41H%*D[ZWv+i#g。

3. sales pitch 推銷
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.
他說起話來就像連珠炮oEKZ5&GKH,oqd[。他一上來就滔滔不絕地推銷，可我連他到底賣的是什么都沒有弄明白^-qsYd^P_H2^~。

4. along with 伴隨
Along with the movement of low turn, teenager sitting in front of middle-aged seems to be covered with a layer of shadow.
伴隨著樂章的低轉，坐在少年前方的中年仿佛被披上了一層陰影3e0HZ)LLvc0uBAHrZs。