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★collapse v. 坍塌
① vi. 倒塌
If explosives are used, vibrations will cause the
roof of the mine to collapse.
With no one to repair it, the old church collapsed
long ago.
② vi.（因精疲力竭）倒下；（身体等）垮掉
After many years’ hard work, my mother’s health
collapsed.
He had run more than forty miles. As soon as he
was out of danger, he collapsed.
