求翻译：首先，左脚重心，右脚打开，脚尖着地，收腹立腰，肩胸自然伸展打开，臀部内敛，兰花指手型，抬头，下巴微微上翘，两眼平视前方。好的，大家跟我做一遍。所有同学，立正，准备，注意。是什么意思？

First, the focus of his left foot, right foot open toes touch the ground, stand waist and abdomen, shoulder and chest stretch natural open hips restrained, orchid fingers-hand, looked up, his chin is slightly upturned, eyes flat as the front. Well, everyone told me to do it again. All students stand

正在翻译，请等待...

First of all, left Center, right foot open toe, abdomen in vertical waist, shoulder and chest naturally stretched open, Hip restraint, Orchid meaning hand, head, Chin slightly upwards, eyes front head. Well, I'm doing it again. All students, stand at attention, ready, note.