Refers to an intimate relationship that is difficult to eliminate. Hua's My Understanding of Mathematics: "The deeper you learn, the more energetic you learn, and finally you have an indissoluble bond with mathematics." What is the "second sister": "It seems that these two sisters who grew up in the city have formed an indissoluble bond with rural children."

Word decomposition

An incomprehensible explanation. Can't solve; I can't live without the "Nine Chapters of the Songs of Chu": "My heart is knotted but I don't understand. I think about it but I don't release it. " Han Meicheng's Seven Hair: "Chu Miao's food, Hu An's embarrassment, don't understand it, drink it off." Li Zhi's poem "Crossing the Sanyi Hall in Taoyuan" in the Ming Dynasty: "Who knows the explanation of the fate of Taoyuan? Because: the reason. Why (why, why). Reason. Origin. * The chance to meet people is considered as destiny takes a hand, which generally refers to the possibility of contact between people or people and things: fate. Charity. Marriage. Once upon a time Edge: edge