So archaeologists have neither history nor legends to help them to find out where the first 'modern men' came from.

于是，考古学家们既缺乏历史记载，又无口头传说来帮助他们弄清最早的“现代人”是从哪里来的。

enterprising settlers unwisely introduced the European rabbit.

一些有创业精神的移民不明智地把欧洲兔子引进了澳大利亚。

The currents of air that the walls of the ship direct upwards, as well as in the line of its course, are enough to give the great bird with its immense wings sufficient sustenance and progress.

沿船体的上升的气流和沿航线向前的气流给这种巨翼大鸟以足够的浮力和推力。

certainly it is more difficult than the arts which involve appreciation of flat forms,

欣赏雕塑品当然比欣赏平面的艺术品要难。

Earlier, we were infants and young children, and consequently more vulnerable;

再早一些，我们是幼儿和小孩子，身体较脆弱；

but they do underline the general principle that the relationship between elephant and mahout is the key to successful training.

但强调了一项基本原则，象和驯象员之间的关系是驯象成功与否的关键。