Martin dual-boundary

例句：

1. 1. The Martin dual-boundary is a popular choice for outdoor enthusiasts.
   马丁双边界是户外爱好者的热门选择。
2. 2. The Martin dual-boundary has been used in various applications to improve efficiency.
   马丁双边界被用于各种应用中，以提高效率。
3. 3. The Martin dual-boundary is designed to provide a secure and reliable connection.
   马丁双边界旨在提供安全且可靠的连接。