usefully

adv．有用地

urgency, urgent, urgently, uric, urinal, urinary, urinate, urine, urn, us, USA, usable, USAF, usage, use, use up, used, used to, used to do, useful, usefulness, useless, uselessly, uselessness, user, user-friendly, usher, usherette, USN, USS, USSR, usual, usually, usurer, usurp, usurpation, usurper, usury, Utah, utensil,