在白天，这动物的肉质覆盖物- - -包含绿藻类- - -伸展越过它的开口壳收紧阳光。
During the day, the animal's fleshy mantle-which contains green algae-spreads over its open shell to take in sunlight.
他也动来动去，从上下壳间的开口向外望。
He squirmed around and looked out through the opening between the shells.
本文利用特征方程根的性质，研究了开口圆柱薄壳精确微分方程的特征方程的渐近解。
Using the root of the characteristic equation, this paper studies the asymptotic solution of the characteristic equation of the open circular cylindrical thin shells.
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