dextral fold

例句：

1. 1. The book has a dextral fold in the center.
   这本书中间有一个侧向折叠。
2. 2. The scientist discovered a dextral fold in the fossil record.
   这位科学家在化石记录中发现了侧向折叠。
3. 3. The new design features a dextral fold that makes it easier to carry and store.
   新设计的一个特点是侧向折叠，使得携带和储存更加方便。