They also secrete a waxy, transparent substance called cutin.
它们还分泌蜡质的透明物质，称作角质。
When the substance is only a few of these layers thick, though, it is known as graphene and is transparent.
当形成的物质达到几个碳原子层的厚度时，便形成了被称为石墨吩的透明物质。
An ultrathin panel comprised of stacking a plurality of glass sheets, which may be coated with a transparent cladding substance or may be uncoated, fastened together using an epoxy or adhesive.
一种由多个玻璃片叠层构成的超薄屏面，这些玻璃片可以涂敷透明的包层物质或可以不涂敷，利用环氧树脂或粘结剂固定在一起。
应用推荐