请教一句英文的意思

懵懂干细胞

often maintenance of multipotency or/ p2 L# k) K# W: }, N
pluripotency
' a1 z* W) @" r/ k4 K! o2 H  O什么叫often maintenace ？
* h6 w% p) X. H% y2 P$ ~望那位高手解惑，谢谢！

tpwang

回复 懵懂干细胞 的帖子& d8 P: w0 ~4 x: d- \
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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, ~( Y6 L# l6 [0 ?3 r/ V. P: @
stem cells, perpetuating the stem cell pool throughout life. Self-renewal) B0 J) i+ F$ P9 M6 [: }0 n
is division with maintenance of the undifferentiated state. This re-
; ?& x" N$ q' s1 y  dquires cell cycle control and often maintenance of multipotency or8 y. C' o# U: U+ w) w
pluripotency, depending on the stem cell.$ |7 t  ?5 y2 V" Z- T) K
麻烦帮忙看一下！谢谢了

tpwang

回复 懵懂干细胞 的帖子# ]7 h0 a% L5 b
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This requires cell cycle control and often maintenance of multipotency or pluripotency, depending on the stem cell.% a4 b/ ^5 u: E$ f# N% F' \

$ c7 C5 N" L" l5 x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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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。
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0 ^% k4 P+ @4 B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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+ K7 {6 w) `  f' p7 RThis 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！！！！