Also, using wildcards in conjunction with optional or repeatable elements can cause ambiguities and non-deterministic conditions.

另外，联合使用通配符和可选或可重复的元素可能会导致歧义和无法判断的情况。

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Another way to use conditions is to apply a filter to a list of repeatable elements.

使用条件的另一方法是将筛选器应用到可重复元素的列表上，如第2部分中的“筛选数组”中所述。

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There is no such thing as testing the climate change hypothesis under repeatable conditions and getting repeatable results, yet the scientific method demands this.

FORBES: A Concise Slice of Climate-Science History