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。

youdao

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。

youdao

"If the Express takes off" is actually the major part of the puzzle, of course.

ENGADGET: Dash Express review