1. Combination and reunion.
Biography of Chu Yu in Southern History: "In the first year of Jingping, Sun Shi and Xiangyang conspired against the Sect."
The fourth episode of A Dream of Red Mansions: "This winning streak has been tortured by a kidnapper for several years, and she is affectionate. If she gets together, it will be a wonderful thing. "
Shen Qingfu's "Six Chapters of a Floating Life": "The power of aggregation always lies with the wife."
Xie Juezai's artificial "Queqiao": "Even between parents and children, there must be bitterness of separation before we know the happiness of aggregation."
2. Chemical terminology.
Monomers are combined into polymer compounds without producing by-products. The resulting polymer compound is called polymer.
3. Futures market terminology.
It means that as the futures contract approaches the expiration date, the spot price and futures price tend to converge, that is, the basis will tend to zero.