请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or% T; K" k+ M! e, T: ^% J
pluripotency
* ]5 P. k& h& c) i什么叫often maintenace ？' e3 }/ ~/ C  j: s7 r
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 more4 |$ z+ w. Y, x. f* l: }
stem cells, perpetuating the stem cell pool throughout life. Self-renewal& g& w; P, l* j
is division with maintenance of the undifferentiated state. This re-
+ u# }7 y% T+ z* i2 mquires cell cycle control and often maintenance of multipotency or* _! y, Q* r! Z
pluripotency, depending on the stem cell.4 m) [2 e, o/ k& U) c7 E4 K* L
麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子" [' \# u& e: y1 A- S4 @& {+ D1 u* g
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This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.- m% O2 R' K/ ]: l6 Y, p( a

' o4 J8 {9 o1 T. |  n  k/ P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 D' f) i9 Z; B" A+ N$ @; Y; u" I. v5 c% {3 c) g  \
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。
! z& P* z: j6 v/ f, N& u
/ P) ~1 Y; f$ W6 f1 o2 x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 x  @. w/ ]9 |5 D
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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！！！！