3. speculate  推测      We speculate that ...

4. examine...to determine    通过研究...证实...

5. 收缩末期左室内径(LV end -systolic dimension, LVESD)

6. 舒张末期左室内径(LV end -diastolic dimension, LVEDD)

7. 收缩末期左室后壁厚度(LV posterior wall thickness at end-systolic

8. 减轻 Future work will be required to see if similar regimes can protect and "rejuvenate" human mitochondria and mitigate the effects of normal or pathological forms of premature aging.