我们大多数人会从清醒状态转入预料中的周期：深度非快速动眼睡眠（non-REM），之后是充满梦境的快速动眼（REM）睡眠。

Most of usdrift from our waking lives into predictable cycles of deep, non-REM sleep, followed by dream-filled rapid-eye-movement (REM) sleep.

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讨论了复杂性概念的科学及哲学定位，给出复杂性概念的一个界定：“存在多个有意义、不确定、非周期的可区分状态”。

The scientific and philosophy location of complexity concept was discussed, and a definition was given that" there are many distinguishable states that are meaningful, uncertain and nonperiodic".

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在顺流向初应力为压应力状态下，系统存在非周期响应，如概周期振动及混沌运动。

When the initial stress is pressure stress, more complicated responses such as almost-periodic solutions and chaos motion are found in the system.

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