This could explain why large numbers of species are packed together in the tropics, but it doesn't seem to hold consistently.

这就解释了为什么热带地区的生物总是聚集在一起，密度很大，但是这一理论并不能站住脚。

youdao

But the care with which this has put together, with a leather strap to hold it, could suggest the former.

但是由于放在一起的细心呵护，用一根皮革绳索捆扎支撑它，使人想起先前的创造者来。

youdao

So, the question is not what would cause Europe to break up, but rather what would cause it to hold together.

FORBES: The End Of Europe: A Civilization Built On Sand

But it takes hundreds of thousands of pounds of the stuff to hold together even a small city--most of it laboriously buried beneath the streets.

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Sadly, we forgot our rubber mallet at home so we couldn't try to beat it to pieces but we did appreciate the housing on the CAT phone it's surprisingly nice to hold and well put together.

ENGADGET: Caterpillar CAT B15 rugged smartphone hands-on Hands-on