You can use [: digit:] in place of [0-9], and [: alpha:] is a more portable replacement for [-a-za-z0-9_]. For example, you can strip all punctuation from a string by using the statement.

您可以使用[：digit：]代替[0 - 9]，并且[：alpha：]是比[- a - zA - z 0 - 9 _]更具有可移植性的替代者。

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And in case you're still wondering what za'atar is, the Middle Eastern spice is a blend of sumac, sesame and herbs that every line cook should now learn to make, according to the magazine.

CNN: And the world's greatest food city is ...