定量预测方法 2、时间序列预测 时间序列的成分:趋势(Trend)、周期(Cycle)、季节(Season) 和意外事件(Erratic events)四个主要因素: 季节(S),反映时间序列在一年中有规律的变化。
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erratic events
不稳定事件
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The Middle East is filled with erratic state and non-state players who could easily set off a series of events, military and diplomatic, that would shut down much of the oil shipments from the Persian Gulf for some period.
FORBES: What's The Trigger That Will Cause The Fed To Act?
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