一项研究发现，与低脂肪饮食的对照组相比，被指定连续5天吃高脂肪食物的健康成年人表现出注意力、记忆和情绪受损。
One study found healthy adults designated to a high-fat diet for five days showed impaired attention, memory, and mood compared with a low-fat diet control group.
访问计划指示，强制优化器使用指定的访问方法进行数据检索，要么是连续扫描，要么是索引扫描。
Access plan directives that force the optimizer to use the designated access method for data retrieval, either sequential scan or index scan.
它在群集中的服务器之间连续发送心跳(heartbeat)，指定是否以及何时关闭其中的服务器。
It continuously sends the heartbeats between the servers in the cluster to identify if and when any of them are down.
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