collapsed是什么意思？

The value of listed shares in American firms collapsed by 57% from its peak in October 2007 to a low in March this year, though it has since bounced back somewhat.

When the bubble burst, demand collapsed

The fire department of New York says the vacant 100-year-old building being pulled down partially collapsed.

The man was collecting building materials when the first floor collapsed underneath him.

It collapsed at least once in the past 1.3 million years.

Now, new evidence reveals that all or most of the Antarctic ice sheet collapsed at least once during the past

Then, abruptly, the cod population collapsed.