The central axial area of each chromatid is a low electronic density region or chromatin free compartment, in which there are lots of RNP.
在染色体横切面中，可见染色体中央有一低电子密度的无染色质区，该区内有大量RNP物质。
At the exit of the bluff-body, recirculation area is formed because of the negative downstream axial velocity.
在燃烧器出口钝体下游轴向速度为负，形成回流区。
Repelling vanes shall be provided on the top shroud to expel solids and reduce axial thrust and pressure at the seal area.
在泵顶部应该配置排斥叶片，用于排出固体颗粒，减少轴向推力和密封区域的压力。
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