将“brain cell"翻译成中文

For example, just three weeks after conception, the human embryo begins to form brain cells.

比如说,胚胎受孕后仅三个星期,就开始形成脑细胞。

As people get older, their brain cells become less efficient.

隨著人們年齡的增長,其腦細胞就變得比較沒有效率。