and he estimated that there were more than 2,250,000 in one acre;

他估计每英亩草坪里有225万多只蜘蛛。

It overran a whole continent.

整个澳洲兔子成灾。

but belongs to the air, travelling it may be six thousand miles to and from its northern nesting home, feeding its flown young as it flies,

在空中十分自如，可以飞行6，000英里，可以飞往北方做窝的老家，再从老家飞回；一边飞一边喂养会飞的雏燕，甚至在顶风时也能在气流中滑翔，似乎气流在帮它前进。

For nearly three and a half centuries she lay at the bottom of Stockholm harbour until her discovery in 1956.

这艘大船在斯德哥尔摩港口的海底躺了将近3个半世纪之后，直到1956年才被发现。

and particularly by a new consciousness of the philosophical undercurrents in the scientific revolution,

尤其是以科学革命中哲学潜流的新意识为依据，

Sometimes a tame elephant is tethered nearby to give the wild one confidence,

有时，把一头已驯服的象拴在旁边能给野象以信心。