union of the weak completions

例句：

1. 1. The union of the weak completions is a complex issue that requires careful consideration.
   弱小的联合是一个复杂的问题，需要仔细考虑。
2. 2. The union of different cultures is essential for building a harmonious society.
   不同文化的联合对于建设和谐社会至关重要。
3. 3. The union of the two companies will create a new market opportunity.
   两家公司的联合将创造一个新的市场机会。