请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or
. W& M0 l( n& ypluripotency. b$ m6 s9 G- H, j% M
什么叫often maintenace ？
7 @' J8 ?/ h, \望那位高手解惑，谢谢！

tpwang

回复 懵懂干细胞 的帖子# y( m8 G5 f# d% B
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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( _7 Y2 K: w3 R
stem cells, perpetuating the stem cell pool throughout life. Self-renewal/ {5 v5 T2 _. N; b! M! D3 j0 o
is division with maintenance of the undifferentiated state. This re-
7 R2 S$ L7 M% [; _! U9 x$ R2 ?quires cell cycle control and often maintenance of multipotency or% ?3 T$ A7 z( V2 d( @
pluripotency, depending on the stem cell.
/ m, u( t- f2 a3 B: V/ A, }麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子
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This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.
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+ N- A7 t5 d0 P4 {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）。: ~1 ]( w3 t9 Y" \4 M' n7 V$ `

* m; A0 {6 w5 B8 x# L( R3 rcell 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。5 g& D" q6 M1 t6 g0 a7 _( m- C
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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：
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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！！！！