然而记忆印记理论的确切机制还不清楚。
The exact mechanism underlying engrams is not well understood.
没有人知道生命所引起的物质扩散的理论极限在哪里，也没有人知道我们的太阳最多能支持多少带有生命印记的物质。
Nobody knows what the theoretical limits to the infection of matter by life would be. Nor does anybody know what the maximum amount of life-enhanced matter that our sun could support is.
一种被称为记忆印记的理论认为，记忆的痕迹或碎片以生物物理变化或生物化学变化的形式分布于整个大脑。
One theory holds that memory traces or fragments are distributed throughout the brain as biophysical or biochemical changes called engrams.
他关于死亡美学创作有许多独创性的文学理论，并且自觉地将这些理论运用到自己的诗歌创作之中，为这些作品烙上了深深的个人印记。
In literary theory, POE puts forward a great number of unique thoughts, and applies his literary theory to his poetry, which is stamped with the corresponding brands of POE.
他关于死亡美学创作有许多独创性的文学理论，并且自觉地将这些理论运用到自己的诗歌创作之中，为这些作品烙上了深深的个人印记。
In literary theory, POE puts forward a great number of unique thoughts, and applies his literary theory to his poetry, which is stamped with the corresponding brands of POE.
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