If the digit is a zero (0), you replace it with a period, but if it's not, you also include the read-only attribute (ro).
如果数字为0,则把它替换成句点,如果不为0,则设置为只读属性(ro)。
There is no numerically specific definition of a crash but the term commonly applies to steep double-digit percentage losses in a stock market index over a period of several days.
股市崩溃在数字上没有具体的规定,不过这一名词一般适用于股票市场指数在几天之内跌去两成甚或更多的情况。
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