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.
yù bǎn
What the chapter's title is named for, and the chapter's claim about itself: these essentials are 著之玉版, inscribed on jade, so that they will survive. It is the same gesture the book makes in chapter 8 with 靈蘭之室, the chamber where the treatise is stored — a text declaring that what it contains is worth the most durable material available. The rest of the chapter is short, dense and hard, which is the point.
jīng
The stored, refined reserve of the body: slow to build, quickly spent. In this chapter it is what the intemperate exhaust through desire — a quantity that can run down, which is exactly why regimen matters.
yù jī
The name the chapter gives to what it has just written down: 命曰合玉機, it is called joined to the jade mechanism. What the mechanism is, the chapter has said two clauses earlier — 神轉不回，回則不轉，乃失其機, the spirit turns and does not return, and when it returns the 機 is lost. So 機 here is the pivot of life itself, and the title claims that this short text is fitted to it. The book later gives the same words to a whole treatise, 《玉機真藏論》.