HDSL

例句：

1. 1. The company's HDSL service is now available in all major cities.
   该公司的HDSL服务现已在所有主要城市提供。
2. 2. The new HDSL router has improved network performance significantly.
   新的HDSL路由器在网络性能方面有显著提高。
3. 3. With the introduction of HDSL, internet access speeds have increased significantly.
   随着HDSL的引入，互联网接入速度有了很大的提高。