在丙酮被完全蒸发掉之前，依然呈塑性的长丝被轻轻地拉伸，目的是使长分子顺直，增加固有强度。

Before all the acetone HAS evaporated, the still-plastic filament is stretched slightly to align the long molecules and develop the inherent strength.

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在丙酮被完全蒸发掉之前，依然呈塑性的长丝被轻轻地拉伸，目的是使长分子顺直，增加固有强度。

Before all the acetone has evaporated, the still-plastic filament is stretched slightly to align the LONG. molecules and develop the inherent strength.

youdao

它要求有相当高的阵面精度、刚度和强度，但有限空间和重量指标使空间与刚度，刚度与重量这些固有矛盾尖锐化。

It should have high surface precision and enough intensity and rigidity. But the limited space and weight target make the contradictions between space and rigidity, rigidity and weight.

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