一周以后，弗莱契对一班新学员讲授高速飞行的原理时在作示范动作。
It happened just a week later. Fletcher was demonstrating the elements of high-speed flying to a class of new students.
当你参观这个健身房时，确保它的员工可以回答你的问题，做出示范动作，并向你展示如何使用这些设备。
When you visit the gym, make sure there are staff members available to answer your questions, demonstrate exercises or show you how to use the equipment.
言语教学法有利于学生形成动作概念，发现示范动作的内在认知规律，但应按照先简后繁的认知规律进行讲解；
Language teaching method is beneficial to for the action concept, to discover the internal cognitive rules, but the teacher should analysis the cognitive rule by teaching the simple one first.
屏幕上的教练在瑜伽和力量训练中会首先示范动作，然后和我一起锻炼，在我保持住平衡时还会对我表示祝贺，在我中途停下来的时候还会提醒我。
On-screen instructors demonstrated and joined me during yoga and strength-training exercises, congratulating me when I held my balance or noting that I stopped mid-exercise.
屏幕上的教练在瑜伽和力量训练中会首先示范动作，然后和我一起锻炼，在我保持住平衡时还会对我表示祝贺，在我中途停下来的时候还会提醒我。
On-screen instructors demonstrated and joined me during yoga and strength-training exercises, congratulating me when I held my balance or noting that I stopped mid-exercise.
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