Depending on the experimental result and the theory of sound wave propagation in layered medium, a mechanism of gradient water-soluble polymer solution was developed.

根据连续分层介质中声波传播理论建立了计算水溶性高分子溶解过程中声衰减的数学模型。计算结果与实验结果一致。

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These speculations sound like science fiction. But the theory of black holes in space is accepted by many serious scientists and astronomers.

这些设想听起来像科幻小说，但空间中黑洞的理论被许多严谨的科学家和天文学家接受。

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The understanding of the theory of fluids including sound propagation through them made little progress from the Greeks to the Renaissance.

从希腊到文艺复兴时期，对流体理论的理解，包括声音是如何通过流体传播的，并没有多大的进展。

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This may sound odd (a theory of mind among hominids?), but as Pagel notes, even two-year-old babies have a greater understanding of what other humans believe than even adult apes do.

FORBES: How a 'Theory of Mind' Made Humans Unique

In theory, there is sound reasoning behind each of these seemingly alarming unilateral moves.

ECONOMIST: A running feud

What's more, senior Whitehall officials have long worried that IDS's plan for a new Universal Credit could go the way of the health reforms - ie they sound good in theory but may prove bureaucratic, costly and unpopular in practice.

BBC: Cabinet reshuffle - the best laid plans....