请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or1 s: _) R  Q* x) o% S4 B
pluripotency) A  B& O. }. H. [' E: \
什么叫often maintenace ？# G" \- b0 o$ j/ |
望那位高手解惑，谢谢！

tpwang

回复 懵懂干细胞 的帖子- p. r7 T  @' F0 w

; r7 }7 c5 K, |+ R5 l' \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$ n: R) R$ H- y% n9 K$ H7 `
stem cells, perpetuating the stem cell pool throughout life. Self-renewal, E6 c6 x+ o) E3 Q) [
is division with maintenance of the undifferentiated state. This re-
. p" h1 L) ~" t1 a+ I6 A* m; I- Wquires cell cycle control and often maintenance of multipotency or
1 Z, O: s2 G% f- ^' E) }- spluripotency, depending on the stem cell.
5 |, U0 T# A9 z: X麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子3 e8 y, ]* f5 b/ ?+ r4 Z; i/ T

. z# Z/ v$ m6 ^# e This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.
- n9 S# j3 O3 C$ G
! I  }3 x2 F; l* K) o7 |6 D% c6 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）。
3 ]$ |' X0 N( o) `4 ?; }4 F3 p6 I5 F9 M  v; D3 a7 x( Y* h7 \
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。
. v* ~5 G1 z- \" p
- x2 V8 V5 f6 G( m0 H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：3 Y) ^" U5 [) k  Y( v% e* X4 b
0 D* x: l3 s! u& o5 E2 c( b
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！！！！