You should write until you get the basic outline of your story intact and then you can always go back and adjust the story to fit any set length requirements you have.
你应该先完成完整的故事基本大纲，然后再将故事按照篇幅要求进行调整。
The turbulence induced by the defects of nozzle, such as the burr at the inlet and outlet, and the roughness of the wall, is the main cause to decrease the length of intact jet.
当射流速度比较大时，喷管的缺陷如进口出口的毛刺和流道壁的粗糙度是诱发湍流使射流破断的主要原因。
Methods:The length of screw channel have been measured on 100 intact skeletons and the bone structure of screw channel have been observed by means of CT laminagraphy on 30.
方法：在10 0例脊柱骨标本上测量螺钉通道长，并对其中30例做CT断层摄影，观测螺钉通道的骨性结构。
Methods:The length of screw channel have been measured on 100 intact skeletons and the bone structure of screw channel have been observed by means of CT laminagraphy on 30.
方法：在10 0例脊柱骨标本上测量螺钉通道长，并对其中30例做CT断层摄影，观测螺钉通道的骨性结构。
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