If you place a spiralling shell down on the table with the spiral facing up then in most shells the spiral evolves in a clockwise orientation from the centre of the shell out.

如果你把一只螺纹贝壳放在桌上，螺旋面朝上，绝大多数的螺线是顺时针方向从中心到边缘展开。

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It appears that the shell has to crack open or break down somewhat to allow the seed to soak up water.

看来，为了让种子吸收水分，种子的外壳必须裂开或破裂。

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The shell somehow has to be broken down before this germination ability expires.

外壳必须在这种发芽能力失效之前被以某种方法破坏掉。

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We learn nothing from examining what is going on down here in n equals one shell.

必须仔细检查不然我们学不到什么的,这里n=1的壳。

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Within a minute, it has slowed the shell down from nearly nine hundred to less than two hundred miles per hour.

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Sugar molecules released from the broken-down shell are then absorbed and used as energy by the bacteria.

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