Unit 123：Plant a garden第123单元：开辟一座花园Use up 400 to 450 calories an hour and have a beautiful garden as well.在你拥有一座美丽花园的同时，你也会在一小时里消耗掉四百到四百五十卡路里的热量。Gardening -with all its standing,stooping,kneeling，walking，watering and weeding一cultivcites a fit physique,not to mention a harvest of fresh vegetables and fruits.从事园艺活动的站立、弯腰、跪下、走动、浇水和除草等动作能培养出我们强健的体格，至于新鲜蔬果的丰收就更不用说了。