elliptic blade section

例句：

1. 1. The engineer designed the machine with anelliptical blade section to improve efficiency.
   工程师设计了一台机器，其叶片部分为椭圆形以提高效率。
2. 2. The new model of thecar has a more ellipticalblade section than its predecessor.
   这款新车的叶片部分比前一代车型更加椭圆。
3. 3. Thescientist used an elliptical blade sectionto cut through the thick ice.
   科学家使用一个椭圆叶片部分来切割厚厚的冰层。