He explains that while deep sleep is characterized by very regular breathing with minimal variations, REM sleep (the phase during which we dream) has a much more erratic breathing pattern.
深度的睡眠表现为伴随着细微变化的非常均匀的呼吸，而REM睡眠(我们做梦时的睡眠模式)的呼吸模式则相对不稳定。
The results show that the particle size has a core-annular flow pattern in radial position and solid volume fraction is much denser at the bottom of the riser.
结果表明：颗粒在管内呈环—核流动结构，固含率在轴向上呈“上稀下浓”的分布特征。
The results show that the particle size has a core-annular flow pattern in radial position and solid volume fraction is much denser at the bottom of the riser.
结果表明：颗粒在管内呈环—核流动结构，固含率在轴向上呈“上稀下浓”的分布特征。
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