零数，指去掉整数后剩下的零头。 以某位数为标准，不足整数的尾数。
n. remainder
misc. fractional amount
据你估计，你能完成分的年出售量是多少？当然讲个零数就止了。
According to your estimate, what is the maximum annual turn - over you can fulfill, in round figures, of course?
该函数在成功时，返回 0，否则返回一个非零数，指出不能发送的字节数。
The function returns zero on success or non-zero to indicate the number of bytes that weren't transferred.
另外，美运通直接冻结了270万个帐户，因为这些帐户不是零数余额，就是已有两年没有激活了。
In addition, Amex flat-out closed 2.7 million accounts because they had zero balances or had been inactive for two years.
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