英语语法分析

PEM are elastic and viscid material.

材料兼具有弹性和粘性。

The boundary layer correction is needed for viscid drag.

为考虑粘性，需进行边界层修正。

Anthocarp clavate, 3-3.5 mm, 5-ribbed, with viscid glands and sparse pubescence, apex rounded.

假果棍棒状，3 - 3.5毫米，5肋，具粘的腺体和稀少短柔毛，先端圆形。