In a gas mask designed to guard against a biological threat, a very fine particulate filter is useful.
预防生物威胁时，优良的微粒过滤器对防毒面具非常有用。
To guard yourself against XSS attacks, filter your input through the htmlentities() function whenever the value of a variable is printed to the output.
要防止受到XSS攻击，只要变量的值将被打印到输出中，就需要通过htmlentities()函数过滤输入。
Column... filter and guard column act on sample.
分析柱…滤头和保护柱作用于样品。
Column... filter and guard column act on sample.
分析柱…滤头和保护柱作用于样品。
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