我有十五个实习生和学生，他们共分三组，我给每个学生都讲了我的教学目的和走廊里塑料人体躯干的优越性。
I've got 15 interns and students in groups of three, each student having been lectured about my pedagogical purpose and my superiority to the plastic torso down the hall.
躯干动作：躯干是人体的支柱，承上启下，连接着头及四肢。
Torso Action: the backbone of the body trunk, nexus, connecting his head and limbs.
我国运动员躯干形态的改善，更加符合人体在水中的运动模式，有效地减少了形态阻力，并与国外优秀运动员的身体形态更为接近；
The improvement of our swimmers' trunk shape is much more fit with the movement mode in water, and can effectively decrease the shape resistance.
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