Раскрыты подробности о договорных матчах в российском футболе18:01
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围绕近期舆论集中讨论的两项争议，1 点点给出具体说明：，详情可参考体育直播
I drew heavy inspiration from this video “Not Knot” by the Geometry Center / Geometry Supercomputer Project in 1991, directed by Charlie Gunn and Delle Maxwell.
Collections of Documents on the other hand, offer a much more relaxed approach. Collections are just namespaces where we insert documents. Documents are objects of any schema and format; but in practice, it almost always is JSON. There are no enforced types, no constraints, no guarded references between documents in different collections. In the same collection, we might have documents of completely different schema - flexibility and openness to any data and column types rules here. In tables, rows have columns of simple, scalar types (mostly) - numbers, ids, strings, dates, timestamps and so on. In collections, documents have fields comprising both simple and composite types like arrays and other documents, nested inside. Same field in different documents, but still of the same collection, might have different types as well - almost anything is allowed here.