exertion

n. 努力，用力

execrably, execrate, execration, execute, execution, executioner, executive, executor, exegesis, exemplar, exemplary, exemplification, exemplify, exempt, exemption, exercise, exercise book, exercise-book, exert, exert oneself to, exeunt, exhalation, exhale, exhaust, exhausted, exhaustion, exhaustive, exhaustively, exhibit, exhibition, exhibitioner, exhibitionism, exhibitionist, exhibitor, exhilarate, exhilarating, exhilaration, exhort, exhortation, exhumation,