Daily Chinese Idiom Guessing Game
To concentrate one's attention and focus completely on something.
会集中。原指君臣协力，集思广益◇形容精神高度集中。
汉·王褒《圣主得贤臣颂》聚精会神，相得益（章）彰。”
She was so engrossed in the book that she didn't hear me calling.