A Ruby hash (or associative array) is a data structure that allows you to define the key for storage (instead of a simple numerical index).
Ruby散列表(或关联数组)是一种数据结构，允许您定义用于存储的键(而不是简单的数值索引)。
2
Numerical results show that fluid flow is the key factor to affect inclusion's distribution.
计算结果表明：钢液的夹带作用是影响夹杂物分布的关键因素。
3
When you store or get information from a list of memcached servers, the memcached client derives a numerical value from the key using a consistent hashing algorithm.