Use the && control operator to combine two commands so that the second is run only if the first command returns a zero exit status.
使用 && 控制操作符来组合两个命令，以便仅当 第一个命令返回零退出状态时才运行第二个命令。
2
The chances of a Greek-style crisis in America are low, given the dollar's reserve-currency status, but not zero.
在美国，考虑到美元的储备货币地位，希腊式危机的可能性很低，但不为零。
3
They then assigned the men in the sample a socioeconomic status score between zero and 96, on a scale drawn up in 1950 (which was as close to 1910 as they could get).