Therefore, directors have functions both in technology and management, characteristics of directors such as, function of management, basic diathesis and art of leadership are crux of the matter.
因此， 科室主任因其技术和管理双重职责所具备的管理职能、基本素质和领导艺术在日常工作中显得尤为关键。
Bleaching is their basic process of formation. The key crux is the reductive bleaching of iron and manganese.
白鳝泥是其基本形成过程，实质是铁、锰的还原性淋溶。
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