In the pioneering days, however, this was not the case at all.

然而，在登山运动的初期，全然不是这种情况。

It caused devastation by burrowing and by devouring the herbage which might have maintained millions of sheep and cattle.

它们在地下打洞，吃掉本可以饲养数百万头牛羊的牧草，给澳洲大陆造成了毁灭性的破环。

In 1928 some porpoises were photographer working like beavers to push ashore a waterlogged mattress.

1928年，有人拍摄到了海豚像海狸一样把浸透水的床垫推上岸的情景。

it is quite reasonable to regard the sea floor as the basic form of the crust of the earth,

因此完全有理由把海床看作地壳的基本模壳，

The administrative overheads of a business are low to the extent that everyone working in the business can be trusted to behave in a way that best promotes the interests of the firm.

如果企业中的每个人都在真诚地为提高企业利润而工作，那么企业的管理费用就会降低到相应的程度。

and should never be added to drinking water.

永远不能掺入饮用水。