a hub of communications的用法和样例：
- The position as a hub of communications was becoming more & more outstanding along with the immigrant upsurge was in the making.
- Chicago is a hub of airline traffic.
- Shaoyang will be another new important hub of communications in central Hunan.
- Let the test team be a hub of for all product quality information.
- That restaurant has served as a hub of the community for decades.