1 sentence

1. 画家先用铅笔在画布上打底，然后再开始上色。

   huà​jiā xiān yòng qiān​bǐ zài huà​bù shàng dǎ​dǐ, rán​hòu zài kāi​shǐ shàng​shǎi.

   The painter sketches a base with a pencil on the canvas before starting to paint.

   Source: Dong Chinese Dictionary