可由三項動作內容的好壞(因素)來決定打直球的正確撞擊(果)。
此三項動作是1.正確的揮桿順序與其節奏、2.身體旋轉過程的圓心移動少、3.握姿與雙臂形狀的正確。實驗發現正確的直球撞擊時的左側揮桿平面是一致的平面(果)，所以可以進入了揮桿平面攝影教學，以及發展成往後的傳感器電子(3D數碼) 智能教學。智能教學就是3D的球飛不直，APP運動科學資料庫會自動告訴你有關三項動作的不正確內容以及修正動作的練習法。
The proper 3 parts body motions are the factors to control a normal impact forming a straight shot. There are 1. the proper swing sequence & its tempo, 2. the least shift body rotation center point among the half swing and 3. perfect neutral grip and arm style. The 3 motion parts are factors controlling an impact (result) for the straight ball shot .
Accordance with the lab. test report, a straight ball shot showing the one swing plane making impact. Therefore, on the ground swing plane pipe together with swinger be worked by the video teach or G 3D sensor APP teach can go into the intellectual swing science teach.Which means, an 3 D ball out un-straightly then APP smart formula feed back your defect 3 parts motion and automatically give you the amend lesson.
