exercise和practice何时可数何时不可数?不是说exercise做运动时不可数么?可是为什么这里做运动时do exercises?这两个词究竟何时可数呢?

exercise和practice何时可数何时不可数?不是说exercise做运动时不可数么?可是为什么这里做运动时do exercises?这两个词究竟何时可数呢?
exercise和practice何时可数何时不可数?
不是说exercise做运动时不可数么?可是为什么这里做运动时do exercises?
这两个词究竟何时可数呢?

exercise和practice何时可数何时不可数?不是说exercise做运动时不可数么?可是为什么这里做运动时do exercises?这两个词究竟何时可数呢?
exercise:1.不可数,表示运动
2.可数,表示练习,（早）操等
do exercises 指的是做练习,不是做运动；do eye exercises做眼保健操
practice:1.不可数,表示练习,实践
2.可数或不可数,表示习惯,惯例.如：a regular practice常规做法

[U] use or practice (of the mind or esp the body) through effort or action （智力的）运用; （尤指）锻炼运动: The doctor advised him to take more exercise. 医生建议他多运动. * Jogging is a healthy form of exercise. 慢跑是有益健康的锻...

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[U] use or practice (of the mind or esp the body) through effort or action （智力的）运用; （尤指）锻炼运动: The doctor advised him to take more exercise. 医生建议他多运动. * Jogging is a healthy form of exercise. 慢跑是有益健康的锻炼方式. * Doing crosswords gives the mind some exercise. 做纵横字谜游戏能锻炼脑筋.
[C] activity or task intended for physical or mental training 练习; 训练: vocal, gymnastic, keep-fit, deep-breathing, etc exercises 发音、 体操、 保健、 深呼吸等练习 * exercises for the piano, flute, harp, etc 钢琴、 长笛、 竖琴等的练习 * The teacher set her class a mathematics exercise for homework. 那位女教师给班上布置数学的家庭作业. * [attrib 作定语] an exercise book, ie a book for writing in with soft covers and lined pages 练习本.
[U] ~ of sth (effective) use or application （有效的）使用或应用: The exercise of patience is essential in diplomatic negotiations. 在外交谈判中, 重要的是要有耐性. * the exercise of one's civil rights 公民权利的行使 * His stories showed considerable exercise of the imagination. 他的故事颇具创意.
[C often pl 常作复数] series of movements or operations for training troops, etc （部队等的）操练, 演习: military exercises 军事操练 * (fig 比喻) an exercise in diplomatic relations 外交关系上的举动.
exercises [pl] (US) ceremonies 典礼; 仪式: graduation exercises 毕业典礼 * opening exercises, eg speeches at the start of a conference 开幕仪式（如致开幕词）.
而practice除了在词组里和每天经常反覆的练习: 例如an hour's practice every day 每天一小时的练习 以外的意思 都是不可数

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exercise译为“操”为可数;译为“运动”不可数
practice不可数