And those who came to save species, came from the outside.

那些动物保护专家。

So it's not really a foreign concept.

所以这并不是一个概念。

Ecosystems free of species defined as exotic are, by default, considered the most natural.

默认情况下，没有物种系统被认为是最自然系统。

Please interpret the meaning of this foreign word that I've never heard.

请解释一下词意义，我从没听说过这个词。

Some countries have more immigrants than locals.

一些国家移民人数比本地人还多。

Today, Florida ranks among the regions with the most invasive species in the world.

如今，佛罗里达被列为世界上侵物种最多地区。

Think of the contact lens as foreign material in your eye.

把隐形眼镜当成是放你眼中物质。

Birds eat the seeds of invasive plants and spread them to other places.

鸟类会吃掉侵植物物种子，传播到其他地方。

A similar pronunciation situation happens with words borrowed from other languages.

从语词汇也会出现类似情况。

The new CEO is Larry Culp, an outsider who joined the board this year.

新任CEO是劳伦斯·卡尔普（Lawrence Culp），今年刚加董事会。

If that's the case, then in a sense, all life on Earth is part alien.

如果是这样话，那么在某种意义上，地球上所有命都有一部分是。

Interested in studying exotic life forms...maybe even identifying new species?

对研究命形式感兴趣？也许还想发现新物种？

But the biodiversity of the 650 square kilometre park is under threat from invasive species.

但在这六百五十平方公里公园内，其物多样性正受到物种威胁。

These native species have been crowded out by invasive mustard and thistles.

这些本地物种已经受到侵芥菜和蓟菜竞争。

For example, in Hawaii today, exotic egg-eating snakes are wiping out many bird populations.

比如，在今天夏威夷，侵食卵蛇正在消灭许多鸟类种群。

But the migrant workers riding the Singapore Flyer did not seem to mind.

但乘坐新加坡摩天轮务工者似乎并不介意。

But that has not stopped the flow of foreign investment to the area.

但是这并不影响资本流。

It takes a little outside heat to get things started.

它们需一点热激发这些程序。

Keratinocytes basically serve to protect against foreign pathogens, and it's typically pretty good at that.

角质形成细胞基本上会抵御病原体侵害，通常它也非常胜任这项工作。

The academy's Institute of Nature Conservation runs a database of invasive alien species.

该科学院自然保护研究所运营着一个侵物种数据库。