It appears the mind regards a doorway as something experts call an ‘event boundary’, signalling the end of one memory episode and the beginning of another.

我们大脑似乎会将门视为所谓的“事件边界”（专家术语），标志着一个记忆场景的结束和另一个新记忆场景的开始。

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He suggests using electric motors or shape-memory materials to repeatedly flick the end of a flexible, wedge-shaped wing, creating a wave that ripples backwards and generates forward thrust.

他建议采用电动机或者有形状记忆功能的材料来反复击打软体契形翅膀的末端，让水产生向后的涟漪从而获得向前的推力。

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But solid state drives (SSDs), which replace hard disks with memory chips to store your data, are much rarer and newer and still can add significantly to the price of even a high-end laptop.

但固态硬盘(SSD)的确是新生事物，在高端笔记本的价格中仍可能占很大比例。

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We end with a New Hampshire memory and a thought on how time moves.

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Nowadays, all leading laptop manufacturers are offering laptops with a hybrid HDD-SSD primary memory and high-end, high-performance laptops with complete SSD memory.

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Texas Memory (a private company) has provided high end Tier 0 DRAM and more recently Tier 0 and Tier 1 NAND flash-based storage systems since 1978.

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