levorotary

例句：

1. 1.The levorotary crystals are used in medical imaging.
   左旋体晶体用于医学成像。
2. 2.The levorotary crystals were discovered by accident.
   左旋体晶体是偶然发现的。
3. 3. The levorotary crystals have been used for centuries in traditional medicine.
   左旋体晶体在传统医学中被使用了几个世纪。