试试 HanyuGuide 的主动间隔重复系统。
开始 7 天免费试用 · US$49.99 / 年
neutrophil (the most common type of white blood cell)
eosinophil (type of white blood cell)
basophil granulocytes (rarest type of white blood cell)
grain
thin or slender
cell (biology)
born of the same parents