请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or, Y7 b) l0 Z7 w3 \" B( G: C
pluripotency
$ ~, n1 ]$ N9 f& b  a' U什么叫often maintenace ？( r2 ^4 [" R3 L. y" G1 _
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
# u- i9 D2 b! S/ S$ Istem cells, perpetuating the stem cell pool throughout life. Self-renewal
1 F) b: Q# n6 D/ L+ lis division with maintenance of the undifferentiated state. This re-: D2 j& F( ]4 _7 ~' t9 U
quires cell cycle control and often maintenance of multipotency or
" V% V6 }$ \% Rpluripotency, depending on the stem cell.
$ H& X( o" j* t7 o麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子8 x* l3 [0 W9 d2 M6 \7 |* b
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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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7 K) z2 ~! {2 A1 q0 [+ Y3 _2 p3 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）。5 R  w! x/ L! g, v; X
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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。2 T' ]2 L2 H% V% m" B# E4 O6 U5 [
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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！！！！