PHRASAL VERB (建筑物)摇摇欲坠,倒塌 If a building tumbles down, it collapses or parts of it fall off, usually because it is old and no-one has taken care of it. (建筑物)摇摇欲坠,倒塌
The outer walls looked likely to tumble down in a stiff wind. [VERBPREP.]
外墙看起来一刮强风就会倒塌。
If the foundations are flawed the house will come tumbling down. [VERBPREP.]