1. William Hanna and Joe Barbera had years of cartoon success behind them, but wanted to try something different - a series that would incorporate contemporary human characters.
2. Deadly coal mine accidents in recent years in China have prompted authorities to take a series of measures to strengthen supervision over mine operation safety.
3. Another leading culprit is a series of colossal volcanic eruptions that occurred between 63 million to 67 million years ago.
4. Zhao admitted that a series of problems have come to the fore in recent years during China's fast economic development.
5. After studying classical ballet for nine years at Spain's National Conservatory, she continued her training under a series of prominent dancers.
6. Property prices have tripled in major Chinese cities in the last five years, prompting a series of government measures to cool down the overheated housing market last year.
7. " Our spies penetrated the network through a series of daring operations over several years, " he said in a Washington speech.
8. The saga of single series products being manufactured for 30 years was over, and the Chinese auto industry was taken to a brand new developmental stage.
9. The dialogue has added to a series of frequent defense exchange programs between China and ASEAN in recent years.
10. ASEAN members have clinched a series of TAC agreements with major powers beyond the region, but the group's dilemma over security has grown in recent years.