derived from bone marrow precursors and are characterized by abundant basophilic cytoplasmic granules that appear electron-dense at the EM level.是什么意思_derived from bone marrow precursors and are characterized by abundant basophilic cytoplasmic granules that appear electron-dense at the EM level.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句