Each entry gives the term in traditional and simplified form, its pinyin, the senses it carries in the classical corpus, the passages where it does real work, and how published translations have rendered it.
zhì shù
What the chapter says it is about, in the phrase 請言道之至數 — allow me to speak of the ultimate numbers of the Way. In this chapter the numbers are not arithmetic for its own sake; they are prognostic. Ten days for shallow colour, twenty-one for deep, a hundred for very deep, a hundred for the untreatable. And at the end the chapter says the terrifying thing about them: once the counter-movement has passed, 不復可數 — the count cannot be taken up again. The same word 數 carries both the prognostic numbers and the counting that stops.
zhì yīn
Where yin reaches its extreme — in this chapter, the belly. It is the third term in a chain of likenesses: water is yin, the region below the eyes is yin, and the belly is where the utmost yin dwells, so water in the belly must show as swelling below the eyes. The chapter argues by category, and says that it is arguing by category.