form into a shape resembling the final, desired one
form or shape beforehand or determine the shape of beforehand
preform的用法和樣例：
例句
用作及物動詞 (vt.)
The superior preform of composites is a basic requirement and one of key factors for fabricating superior properties composites. 摘要高質量複合材料預製塊是獲得高性能複合材料的基本要求和關鍵要素之一。
An algorithm of three-dimensional braided composite material preform image proce ssing based on mathematics morphology is presented. 提出一種基於小尺度的數學形態學的三維編織複合材料預製件圖像的邊緣檢測方法。
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