rostral seta

例句：

1. 1.The scientist observed the animal'srostral seta and noted itsunique shape.
   科学家观察了动物的额突并注意到其独特的形状。
2. 2. The researcher found that the rostralseta of this species is crucial formating behavior.
   研究者发现这种物种的额突对于求偶行为至关重要。
3. 3. Therostral seta was usedas a diagnostic tool to identify the speciesof the unknown animal.
   额突被用作诊断工具来识别未知动物的物种。