Alfred had learned many of their ballads in his youth,

阿尔弗德年轻时学过许多民歌，

The degree of secrecy naturally varies considerably.

保密程度自然差别很大。

One wonders also why Nature, with some snakes, concocted poison of such extreme potency.

然而，在脊椎动物中，大自然神秘模测地只选择了蛇（还有一种蜥蜴），人们弄不清楚大自然为什么在某些蛇的身上调制出如此高效的毒液来。

They had laboured for three years to produce this floating work of art;

瑞典人辛辛苦苦干了3年才建成这件水上艺术品，

Convinced of the importance of education,

深深懂得教育的重要性，

Waves are the children of the struggle between ocean and atmosphere.

海浪是大海和空气相斗的产物。