It is true that during their explorations they often faced difficulties and dangers of the most perilous nature, equipped in a manner with would make a modern climber shudder at the thought,

确实，在探险中他们经常遇到惊心动魄的困难和危险，而他们装备之简陋足以使现代登山者一想起来就胆战心惊。

But suppose the earth could be covered with sensors spaced one foot apart,

假设地球上可以布满传感器，每个相隔1英尺，

The second factor is more interesting and more fundamental.

第二点更有意思，也更重要。

she presented a more majestic spectacle than Stockholmers had ever seen before.

瓦萨号展现的壮观景象是斯德哥尔摩人从未见过的。

It is always wiser and safer to face up to reality,

遇事采取面对现实的态度总是比较明智和稳妥的，

An ocean wave passing through deep water causes a particle on the surface to move in a roughly circular orbit,

穿过深水的海浪使水面上的一个微粒按照一种近乎圆形的轨道移动，