In order to ensure A phase and B phase circuits are symmetric, digital potentiometer X9C503 with exterior pressed key in the feedback amplification circuit is designed.

在反馈放大电路设计时，采用数字电位器X9C503与外部按键配合，达到了A、B两相电路的对称性。

youdao

So what's the mole fraction of B in the gas phase?

那么B在气相中的摩尔分数是多少？

youdao

It's the molar fraction of B in the gas phase times the total pressure.

这分压等于气相中b的摩尔分数，乘以总压强。

youdao

So what matters to me isn't just being alive, but being back here during Phase B.

所以重要的就不是活着，而是回到B阶段。

耶鲁公开课 - 死亡课程节选

There's Phase B.

这里是B阶段。

耶鲁公开课 - 死亡课程节选

Medicine today has entered its B-17 phase.

NEWYORKER: The Checklist

Flurizan completed Phase 2 human trials in Alzheimer's patients, and it is also in Phase 2-b human clinical trials for treating patients with pre-metastatic prostate cancer.

FORBES: Magazine Article

That proposed phase includes development of the SM-3II B interceptor, an advanced version of the missile currently provided aboard our Aegis missile defense warships.

FORBES: National Insecurity: Obama/Kerry Gun And Missile Policies To Disarm America Are Indefensible