The main reason of market failure of the NCF in Miyun watershed is that its external economies couldn't be realized.
密云集水区公益林市场失灵的主要原因是其正的外部性不能得到体现。
2
Object: To investigate the mechanism of the antinociceptive role of thyrotropin releasing hormone (TRH) in nucleus cuneiformis (NCF).
目的：探讨楔状核（NCF）内促甲状腺素释放激素（TRH ）抗伤害感受作用的机制。
3
From their relationship, the author found that the calculating formula of net cash flow (NCF) in the book named Financial Management for national accounting qualification test is inappropriate.