Someone had coloured in all the black and white pictures. [VERB PREP. noun (not pronoun)]
有人给所有的黑白照片都上了色。
Draw simple shapes for your child to colour in. [VERB PREP. noun]
画一些简单的形状让孩子涂上颜色。
英汉双解词典包含141091条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。