experimentation

n.实验，试验

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