Enkephalins are a type of opiate that the body produces to dull pain sensations, but in cases of chronic pain, these agents appear not to flow in sufficient quantities.

脑啡肽是机体产生的一种类型的缓解疼痛感觉的阿片受体，但在慢性疼痛的情况下，这些物质似乎流量不够。

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The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations.

研究人员指出，低频过程诸如河流流量和地下水水位的波动，通常不会对人类产生明显影响。

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because creation is not about pushing, it's about just allowing the flow to come through you.

因为创意不是逼出来的，是让它自然流露。

艺术从自由起步 - SpeakingMax英语口语达人

This is not likely to flow into the banks until trust in them, and in the tax system, rises.

ECONOMIST: Russia's economy

At the moment, the routing algorithm does not talk to the flow-control algorithm, which means paths do not change even when there is congestion.

ECONOMIST: Algorithms

The challenge is not to be addicted to the flow.

FORBES: Techquotable 3