DịCH Vụ đồ CúNG KHAI TRươNG OPTIONS

b : to fix (one thing, like a cherished stone) inside of a border of steel : position in a very environment c : to put within a specified literary or extraordinary setting a Tale established in ParisThe disjoint union of two or even more sets is analogous to the union, but, if two sets have components in widespread, these factors are considered as