函数首先对两个或多个数组进行比较； 如果第一个数组中的键和值并未在其他数组中出现，那么就返回这个未出现的键和值。

The array_diff_assoc() function compares two or more arrays, and returns an array with the keys and values from the first array, only if they are not present in any of the other arrays.

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函数首先对两个或多个数组进行比较； 如果第一个数组中的值也同时在所有的其他数组中出现，那么就返回这些键和值。

The array_intersect() function compares two or more arrays, and returns an array with the keys and values from the first array, only if the value is present in all of the other arrays.

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在Update函数中执行大多数任务是比较常见的，然而也有其他函数可以使用。

The common pattern is to perform most tasks inside the Update function, but there are also other functions you can use.

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