expertise

n.专门知识(或技能等)，专长

expeditionary, expeditious, expeditiously, expel, expend, expendable, expenditure, expense, expense account, expensive, expensively, experience, experienced, experiential, experiment, experimental, experimentally, experimentation, expert, expert cook, expertly, expertness, expiate, expiation, expiration, expire, expiry, explain, explanation, explanatory, expletive, explicable, explicate, explicit, explicitly, explicitness, explode, exploded diagram, exploit, exploitable,