请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or- \9 m  @/ c: ?3 L
pluripotency7 O) q% w8 q& ?- @) e
什么叫often maintenace ？6 F2 ^2 r% H, R) m# s! K
望那位高手解惑，谢谢！

tpwang

回复 懵懂干细胞 的帖子
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把上下文一起贴出来，贴一个“段落”或起码一个句子。

懵懂干细胞

Self-renewal is the process by which stem cells divide to make more+ u6 V2 i" @. q% ?8 L) }+ D- N
stem cells, perpetuating the stem cell pool throughout life. Self-renewal
5 D5 s8 Y. w# {0 m8 g- yis division with maintenance of the undifferentiated state. This re-
3 N1 k$ y9 b, nquires cell cycle control and often maintenance of multipotency or
( A4 H3 B$ f8 F; E' s' Bpluripotency, depending on the stem cell.
3 J+ J# z( G: L& j麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子
5 R# H+ k+ L3 K; X/ ?
7 {& Z$ k8 X$ n6 u$ b/ C0 p6 U7 F This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.
1 }( w/ d/ {8 a( _: h% a( l
, p" b1 |, e% [+ S& I这一(自我更新)过程（的实现）要有对细胞周期的控制，并常涉及多能性的维持（mutipotency or pluripotency，根据不同的干细胞而定）。
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cell cycle control和maintenance of都是requires的宾语，often是用来修饰maintence的，意思是“往往”也需要（在自我更新过程中）维持多能性。7 T0 U+ o( ~' j
) N* C. x: P5 u! u0 V
先把句型结构搞清楚了，理解就容易些了。这是个带两个并列宾语的结构。完全展开的话就是：
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This requires cell cycle contro, and often requires maintenance of multipotency or pluripotency (which depends on the stem cell types).

懵懂干细胞

高明！谢谢！！！！

懵懂干细胞

高明！谢谢！！！！