换言之，不确定性降低了平均消费倾向，但提高了边际消费倾向。
In other words, uncertainty lowers the APC but raises the MPC.
由来水不确定性带来的申报电量风险和对边际电价预测不准确引起的申报电价风险，是水电厂参与电力市场竞价的主要风险。
The main risk for hydropower plants at the in electricity market is the bidding energy risk induced by the uncertainty of inflow and marginal electricity price forecast.
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