If the failure is defined as the final fracture of a component, then both S-N curves and crack growth rate curves reflect the fundamental material behavior under fatigue loading.

如果都把一个构件的最终断裂作为疲劳破坏的定义，则S - N曲线和裂纹扩展率曲线均是反映金属在疲劳载荷作用下的基本材料特性。

youdao

The first record contains the number, n, of distinct type of assignments that contribute to the final grade; for example, quizzes, tests, exams, and so on.

第一个记录包含形成期末成绩的不同类型的任务的数量，n，举例来说，小测验、测试、考试，等等。

youdao

So it's a more specific version of the equation where we have the n final equal to 2.

当我们令n等于2时,使这个这个方程变成更具体的版本。

youdao

So kind of that strange cursive r, and our n final is 2, R so 1 over 2 squared minus n initial, so 1 over 3 squared.

因为我们可以在这里用到它，这个有点奇怪的花体。

麻省理工公开课 - 化学原理课程节选

So we can't actually see any of that, it's too high energy for us to see. So everything we see is going to be where we have the final energy state being n equals 2.

所以我们是看不见它的,它能量太高了，我们能看见的,都是终态等于2的情况。

麻省理工公开课 - 化学原理课程节选

Absorption is just the opposite of emission, so instead of starting at a high energy level and dropping down, when we absorb light we start low and we absorb energy to bring ourselves up to an n final that's higher.

吸收就是发射的逆过程,与从一个高能量到低能量不同，当吸收光时，我们从低能量开始,吸收能量到一个更高的能量。

麻省理工公开课 - 化学原理课程节选

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