极深研几

Explanation: Research: Research, review; few: fine. Refers to the study of the Department of things esoteric esoteric 　　Usage: Partial official; as predicate; describe the profound study, detailed 　　Source: "Book of the copulative": "Cardiff" easy ", the sage is also the reason why a few deep and Research." 　　Examples: Satan will make the world people with lofty ideals are exhausted itself fine, ~, to be engaged in the manufacture and then. ★ clear Guanying "Prime threats I Appendix Shanghai Daily"