integument tapetum

例句：

1. 1. The scientist carefully removed the integument to examine the cells.
   科学家小心翼翼地剥去皮肤以检查细胞。
2. 2.The integument is a protective barrier that keeps the plant from drying out.
   外皮是一种保护屏障，防止植物干燥。
3. 3.The integument is made up of several layers, each with its own unique properties.
   外皮由几层组成，每层都有其独特的性质。