工人们从松树上收集树脂来制作清漆。

Workers collect ___resin from pine trees to make varnish.

这种涂料含有特殊的合成树脂，能有效防止腐蚀。

This coating contains special synthetic ___resin that effectively prevents corrosion.

她在房间里点燃了松树树脂，让空气充满清新的香气。

She lit some pine ___resin in the room to fill the air with a fresh fragrance.