求翻译：PDE4 inhibition by cilomilast attenuates bleomycin-induced pulmonary fibrosis in mice. Primarily, cilomilast exerts its beneficial effects via reduction of inflammatory response, although it does not significantly affect neutrophils release. Cilomilast treatment also moderately affects tissue remodeling at late fibrosis stage. This seems to be the consequence of its anti-inflammatory action, although direct effect on tissue remodeling via inflammation-independent mechanism is highly possible.是什么意思？

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