A major scientific puzzle has been how and why immature hematopoietic stem cells initially express genes that are characteristic of both cell lineages.
在科学界,最大的遗憾是在不成熟的造血干细胞中,为什么会同时有两种细胞系特殊基因的表达。
The first part: There has always been a puzzle that whether language can fully express its meaning in the relationship between language and meaning for a long time.
第一部分:言与意的关系问题长期以来有言能尽意和言不尽意的困惑,但这是在不同意义指向下的矛盾。
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