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Primer
01
底漆, 封闭漆
an undercoat applied before painting that prepares and protects the surface
02
入门书, 基础书
an introductory book that provides basic knowledge on a subject
03
妆前乳, 打底霜
a cosmetic product used to create a smooth base for makeup
04
引信, 引爆器
any igniter that is used to initiate the burning of a propellant