To prove that factor a has no effect whatever on outcome b may be important in the sense that it refutes a hypothesis.

证明因素 a 对结果 b 没有任何影响可能是重要的，因为它驳斥了一个假设。

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The team discovered that a certain B. subtilis signalling molecule, known as competence and sporulation factor (CSF), is detected by human gut cells (Cell Host &Microbe, vol 1, p 299).

研究团队发现某些被称为“细胞集落刺激因子”（CSF）的枯草芽孢杆菌的信号分子可以被人体的内脏细胞侦察到。

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Because the DM-10 and B-100 use no global negative feedback, the damping factor is very modest.

由于糖尿病- 10和B - 100使用没有全球性的负反馈，阻尼因素是非常温和的。

youdao

Without intrinsic factor, vitamin B-12 can't be absorbed and leaves your body as waste.

CNN: Vitamin deficiency anemia

Former X Factor star Misha B has scored her first top 10 hit with Do You Think Of Me.

BBC: Robbie Williams

The holiday season is (a) upon us and (b) often the deciding factor in whether a given brand had a successful year or not.

FORBES: Competition Promises To Be Fierce For Brands This Holiday Season