光螺属于软体动物门，腹足纲，光螺科。主要有3种螺：大光螺、马氏光螺、褐奋斗螺。
通过调节胆甾相液晶的螺矩、聚合物的浓度和聚合反应条件，我们能使PSCT光阀性能最优化。
We optimized the performance of the PSCT valve by adjusting the cholesteric pitch, the polymer concentration and polymerization condition.
鹦鹉螺吃什么的问题今年有了答案，x光显示杆鹦鹉螺的咽喉中有小甲壳类动物的痕迹。
What ammonites-or, at least, some of them-ate became clear earlier this year when an X-ray showed a small crustacean in the jaws of a species called Baculites.
本发明的合成 方法简便直接，从外消旋的螺环二酮出发得到螺环骨架具有不同绝对构型的光 学纯的手性配体。
The synthetic method is simple and convenient and direct; and the spiral ring skeleton obtained from spiro-diketone has optical pure chiral ligand with different absolute configurations.
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