visiting Danish camps disguised as a minstrel.

他扮作吟游歌手到丹麦军队的营地里侦察。

Silicon Valley may prove a classroom for building a global business.

它很可能成为建立全球商业的一个教学场地。

As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.

正像人们常常指出的，知识是一把双刃刀，可以用于造福，也可以用来为害。

And so with solids such as a shell, a nut, a plum, a pear, a tadpole, a mushroom, a mountain peak, a kidney, a carrot, a tree-trunk, a bird, a bud, a lark, a ladybird, a bulrush, a bone.

对于其他实体，如，贝壳、核桃、李子、梨子、蝌蚪、蘑菇、山峰、肾脏、胡萝卜、树干、鸟儿、花蕾、云雀、瓢虫、芦苇以及骨头也应这样来感觉。

This shows how long it was before we deemed it necessary to make sure that all our children could share in the knowledge accumulated by the'happy few' during the past centuries.

这说明，经过了多么漫长的时间之后，我们才认识到，有必要确保我们的孩子享有多少个世纪以来由‘少数幸运者’所积累起来的知识。

below 20 per cent, its bactericidal action is negligible.

浓度低于20％时，杀菌能力基本上就不存在了。