请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or1 i+ \' C9 m% A6 P
pluripotency* n/ V& q: I+ H5 H/ ^+ p+ O8 X% Y
什么叫often maintenace ？
0 L4 I- l' c9 j! r$ b望那位高手解惑，谢谢！

tpwang

回复 懵懂干细胞 的帖子
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2 J% V  O) b% O( z, Z, F# `( [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
" k5 v  h% Z( S1 [3 nstem cells, perpetuating the stem cell pool throughout life. Self-renewal
  N3 }' {% d9 q# l. Kis division with maintenance of the undifferentiated state. This re-
2 Z, D; S3 ^4 R* Uquires cell cycle control and often maintenance of multipotency or
2 @0 \5 M/ k0 R: npluripotency, depending on the stem cell.0 {, N* \# ]( \9 H4 J$ v
麻烦帮忙看一下！谢谢了

tpwang

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$ U+ p2 l; w9 T This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.
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8 K1 {* e! t) W- d6 y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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9 T* w  H. |9 _  D1 \. qcell 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。2 K0 I* B) O- Y" y
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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：1 C1 U: [5 _& R5 H3 s  p9 c  s5 i

; q  p; @# d) n6 ?5 XThis 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！！！！