epicuticle
n. [昆] 上表皮（指昆虫外表皮或外骨骼外部蜡质层）
例句
The cuticle has two layers: epicuticle and endocuticle.
表皮可分二层：上表皮和内表皮。
The epicuticle i3 dense and relatively uniform in thickness.
上表皮致密，较薄，厚度均匀。
The epicuticle is dense and relatively uniform in thickness.
