1
1.break down
2.cut down
3.live down
4. back down
3
1. lifesaving
2. medical
3. body
4. invasive
5. molecular
6. operations
7. virtual riality
8. huge
9. artificial
1
1.break down
2.cut down
3.live down
4. back down
3
1. lifesaving
2. medical
3. body
4. invasive
5. molecular
6. operations
7. virtual riality
8. huge
9. artificial