世界种是指分布遍于世界各地,在地球上占相当大分布区的动植物种。多为适应性强、生态域广的种类。植物中有大车前、龙葵、繁缕、蒲公英等,其中人为因素传播的杂草占很大比例。此外,淡水生长的浮萍、芦苇、香蒲,盐渍土上的盐角草、碱蓬等,虽局限于特定生境,实际占的空间很有限,但具有近乎世界范围的分布区。动物中以具有极强被动迁移能力的某些水生无脊椎动物最为显著,陆地动物中分布较广的有仓鹗、狼、家鼠、臭虫等。
下个世纪的电视屏幕将与一种新兴的世界电信网格相连。
The television screens of the next century will be linked up to an emerging world telecommunications grid.
世界上约有3万种鱼。
世界见证了两种对未来的设想间的激烈较量。
The world had witnessed a titanic struggle between two visions of the future.
In such a world it seems writing poems is a kind of--well, even surviving is a kind of guilty privilege.
在这样的世界中,写诗看起来是一种,甚至幸存也是一种罪恶的特权。
So, it has a quality that is different from Humbert's elaborate world view through which we see or don't see Lolita.
所以它有一种不同于亨伯特的精制世界观的特质,这在洛丽塔里也许出现过。
There's a kind of organic continuity that men partake of just as the natural world does.
如同自然世界的新陈代谢,人类也有一种,有机的代谢与持续。
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