"the doctor recommended regular exercise"
"he did some exercising"
"the physical exertion required by his work kept him fit"
"he warned against the use of narcotic drugs"
"skilled in the utilization of computers"
"practice makes perfect"
"you must work the examples at the end of each chapter in the textbook"
"exert one's power or influence"
"Some parents exercise their infants"
"My personal trainer works me hard"
"work one's muscles"
"this puzzle will exercise your mind"
"She works out in the gym every day"
"We drilled French verbs every day"
"Pianists practice scales"
exerciser n. 做运动的人，肌肉锻练器具;
entire exercise 整套动作;
apportionment exercise 分派办法;
counteracting exercise 对抗练习;
warm exercise 暖身运动;
independent exercise 独立练习;
floor exercise 自由体操;
familiarization exercise 见习;
endurance exercise 耐力训练;
field exercise n. 野外演习;
combined exercise 全能;
opening exercise 朝会;
abdominal exercise [医]腹肌练习，腹部运动;
vocal exercise [医]发声训练;
mental exercise [医]意气功;
rehabilitation exercise [医]康复运动，康复锻炼;
soulcontrolling exercise [医]摄魂法;
winter exercise [医]冬季运动;
tonic exercise 补养功;
resistance exercise [医]抗阻训练;
myotherapeutic exercise [医]肌治疗性训练;
exercise electrocardiography [医]运动心电图描法记;
selfcultivating exercise [医]修身法;