tetradentate

例句：

1. 1. Thespider's eight legs areadapted for climbing and hunting.
   蜘蛛的八条腿适应了攀爬和捕猎。
2. 2. The plant has a tetrad ofleaves on each stem.
   这种植物每根茎上有四片叶子。
3. 3. Thetetrad of scientists isresponsible for the project'ssuccess.
   这四位科学家负责该项目的成功。