Because the acetyl wasn't present in young 3-month-old mice, the study concludes that it ACTS as a switch for a cluster of learning and memory genes.

由于这种醋酸基在3个月大的白鼠脑中并不存在，研究显示这种醋酸基扮演了学习和记忆基因群组开关的角色。

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Connecting storage to the cluster can be direct or through a storage area network (SAN) switch, either by fiber, copper, or a mixture of the two (see Figure 1).

可以用光纤、铜缆或结合使用二者，直接把存储器连接到集群，或者通过存储区域网络(SAN)交换机连接(请参阅图1)。

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The topmost section features a physical volume dial that also serves as a mute switch when pushed, surrounded by a circular cluster of LEDs (for clockwise-flowing level indication) and then a secondary outer ring of capacitive buttons and LED indicators.

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