据信，数以千计的倒塌建筑物中，有许多是1981年建筑标准提高之前建造的。
It is thought that most of the thousands of buildings that collapsed were built before 1981, when building standards were tightened.
城市中的豆腐渣建筑造成了其他许多建筑物的倒塌。
Poor construction throughout the city caused many buildings to collapse.
许多房屋遭到完全破坏，人们担心余震会使更多的建筑物倒塌。
The United Nation reports many homes are totally destroyed and there are fears aftershocks could bring more structures down.
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