耳不旁听

Explanation: Ears do not step aside to listen. Dedicated manner described 　　Usage: As a predicate, attributive, adverbial; a person to concentrate 　　Source: Qing Cao Xueqin's "Dream of Red Mansions" 48 back: "he saw his sisters, tell jokes, they order you to go under the bamboo, before digging the heart does not sit in the ear search bile, looked straight ahead." Thesaurus:  Head not askance, be all eyes, Not evil, as the project