entail

v.使成为必要，需要

enrol (also esp US enroll), enroll, enroll in, enrollment, enrolment, enrolment (also esp US enrollment), Ens, ensconce, ensemble, enshrine, enshroud, ensign, enslave, enslavement, ensnare, ensue, ensure, ensure (US insure), ensure sb. against, ENT, entangle, entanglement, entente, entente cordiale, enter, enter for, enter into, enter upon, enteric, enteritis, enterprise, enterprising, enterprisingly, entertain, entertainer, entertaining, entertainingly, entertainment, enthral (also esp US enthrall), enthrall,