请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or: }) T9 ]- ~, u7 j
pluripotency
9 L: _& n- Q0 w; z什么叫often maintenace ？
+ T6 Z% v# L. d: z# g- G望那位高手解惑，谢谢！

懵懂干细胞

Self-renewal is the process by which stem cells divide to make more* x% m5 Y- |3 x/ \4 [+ n+ x
stem cells, perpetuating the stem cell pool throughout life. Self-renewal
: A. l- B! N/ l; P0 P& t2 s' qis division with maintenance of the undifferentiated state. This re-  G& Q( A& h% c/ b, o$ I$ W
quires cell cycle control and often maintenance of multipotency or  H. T( D" |4 R4 r! Q  d  m+ n
pluripotency, depending on the stem cell.. F( J& q$ Q4 G6 e
麻烦帮忙看一下！谢谢了

懵懂干细胞

高明！谢谢！！！！

懵懂干细胞

高明！谢谢！！！！