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　　Old drought the backstroke of 4 bid farewell

　　Water is overflowed two buccal, point to blue sky nasally, hu Chen sucks float, sideslip not turns. Carry a shoulder to take a hand, double spoke rotate, sharp behead water, make a long arm sends coxa. Horizontal palm carries water, hang down ancon sunken shoulder, push press a gleam of, stroke leg facing. Sufficient ankle stretchs tight straight, double foot introvert, next pressing is kicked on, billow rolls foot needle.

Behavioral structure and technology want a place

(１ ) left hand is in humeral arm upper part enters water in, end points to enter water first, the right hand finishs thrash, begin action of turn around and stretch out one's hand. (2) the momentum that left hand generates in place of phase of second half of turn around and stretch out one's hand causes ancon and arm to maintain unbend to sink in water, cause begin upgrade shift. The right hand shows water at the same time, wrist is inflectional. (3) when left hand delimits outwards downward, ancon joint is inflectional, right leg begins 對 horn string on move. (4) pass humeral arm when left hand, ancon joint is inflectional achieve the biggest (90 degrees) . Turn around and stretch out one's hand begins to rotate, the centre of the palm is pointed to outside. (5) cross humeral arm when hand 橫, delimit brachial ancon joint begins extend. At this moment body 滾 is moved achieve the biggest 40~50 to spend) . (6) left arm finishs thrash, ancon joint is complete extend, pronation, the position that leaves 6 inches in hip about (7) the right hand sinks in water, preparation catchs water. (8) the right hand catchs water is the unbend that uses ancon joint. Left leg kicks water downward (9) the right hand uses thrust water backward. Left shoulder is carried because of the 滾 of the body is moved and going up. (10) sword arm begins to be down 壓 water movement, left leg continues to kick. (11) while sword arm finishs thrash, movement of left hand turn around and stretch out one's hand also is close to finish.