He must be here just now.

他刚才一定在这儿。

youdao

He must be here in time tomorrow.

他明天必须及时来到这。

youdao

Tell him that he must be here by nine.

告诉他，他必须九点钟之前到这里。

youdao

And I use the term photon here, and that's because he also concluded that light must be made up of these energy packets, and each packet has that h, that Planck's constant's worth of energy in it, so that's why you have to multiply Planck's constant times the frequency.

我这里用光子这个词,是因为他还总结出光,必须由这些能量包组成，每个能量,包有这个h，普朗克常数代表,里面的能量，所以这就是为什么你们,要用普朗克常数乘以频率。

麻省理工公开课 - 化学原理课程节选

But here, since he agrees with my own prejudices, he must clearly be correct.

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