| The human body and health | Lungenkollaps + | collapsed lung + | Symptoms, ailments and illnesses | B |
Most Common Compounds Set 1:
Most Common Compounds Set 2 :
| Beginner - Low Intermediate: 1418 (noun: earthquake)  After the earthquake, many buildings collapsed.  Nach dem Erdbeben stürzten viele Gebäude ein.  Sau trận động đất, nhiều tòa nhà sụp đổ. |
hố sụp 
collapsed crater