adv.眼睛地,视力地
Racemization is found with optically active substrates.
发现旋光基质有外消旋作用.
The racemate is optically inactive.
外消旋体是不旋光的.
Such substances are optically anisotropic and birefringent.
这种材料是光学各向异性的,因而是双折射晶体.