不透明层 meaning in English
opaque coat
opaque layer
Examples
- In pearls , the nacreous layers are generally translucent and composed completely of aragonite , whereas layers without pearly luster are opaque and composed of aragonites and / or vaterites with their relative concentrations different in different pearls
其中具珍珠光泽的珍珠层一般呈半透明状，均?文石组成；无珍珠光泽的不透明层有时由文石组成，有时由六方碳钙石组成。