有学者已就清代级数论的一组初始条件作了不少解释，至于它被近代级数论完全取代的决定因素则未论及。
The initial conditions of Qing-times series have been explored by many scholars, however, the reasons why it was entirely replaced by modern series have not been discussed yet.
有不少人认为，制约河南外贸出口的“瓶颈”因素在于省内外企业数量少、规模小。
Lots of people hold that the bottleneck factor which restricts export trade of Henan Province is due to the little scale and small quantity of foreign investment.
第一语言阅读与二语或外语阅读有不少重要的共同因素，但过程大不相同。
Reading in the L1 shares numerous important basic elements with reading in a second or foreign language, but the processes differ greatly.
第一语言阅读与二语或外语阅读有不少重要的共同因素，但过程大不相同。
Reading in the L1 shares numerous important basic elements with reading in a second or foreign language, but the processes differ greatly.
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