The only rule for defining a filter is that it must let events of the desired kind pass and block all others.
定义筛选器的唯一规则在于，它必须允许所需类型的事件通过并阻止所有其他事件。
2
This time, Di Maria took out the middleman, intentionally handling the ball to block a Vallecano pass that resulted in his second booking of the match.
这次，迪玛利亚出任中场，故意手球阻止瓦列卡诺传球导致他被出示第二张黄牌。
3
When I pass the code block created by passing my target number as a parameter, Scala curries up a new function.