complementary strand

例句：

1. 1. The new software is designed to be complementary to the existing system.
   这款新软件旨在与现有系统相辅相成。
2. 2.The research suggests that these two factors are complementary in their effects.
   研究表明，这两种因素在效果上是互补的。
3. 3. The study found that the two treatments were indeed complementary in their effectiveness.
   研究发现，这两种治疗方法在有效性上确实是互补的。