GARCH and GARCH-M models imply that the volatility is weakening, and investors who used to be risk preference have become risk aversion.是什么意思_GARCH and GARCH-M models imply that the volatility is weakening, and investors who used to be risk preference have become risk aversion.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句