原因
1.A number of factors are accountable for this situation.
A number of factors might contribute to the phenomenon.
2. The answer to this problem involves many factors.
3. The phenomenon mainly stems from the fact that...
4. The factors that contribute to this situation include...
5. The change in ...largely results from the fact that...
6. We may blame ...,but the real causes are...
7. Part of the explanations for it is that ...
One of the most common factors is that ...
Another contributing factor is ...
Perhaps the primary factor is that
But the fundamental cause is that
Beijing-Tokyo ties 'unlikely to recover soon'
Argentines fret as leader has brain operation
Tickets for 9 yuan offered on new Hebei air route
London mayor hails free trade, subway system during visit
Xi calls for targeted policies to fight poverty
Former mistresses are active online whistle-blowers
Toronto mayor admits he smoked crack
Chongqing launches 72-hour visa-free stays
Weatherman with vision dies, age 98
Tragedy leads to calls for school safety
Yao, NBA to open training school for teens
Shuttle bus makes time fly for Beijing commuters
Chongqing finds opportunity selling motorcycles
World's first curved smartphone hits South Korean stores
Lenovo's new secret weapon: Hollywood star
Chinese arts travel the world
17 accused of making and selling fake drugs
Wanda prepares film, television industrial park
30,000 turn out in Beijing Marathon
Study finds 40 percent of parents happy with one child
Premier seeks talks over dispute
Nature's light show 'once-in-a-lifetime' trip
New road links remote Tibet county to rest of the country
Xi offers support to overseas Chinese
Far horizons beckon as agencies eye Chinese
Europe monitors phones, Internet
Newspaper offers apology after detained journalist's confession
Spain seeks time zone change
Market for English courses surges
Giant duck to exit after drawing crowds
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