track__________ 3. 有记载的______ record 4. 尝试去做 _attempt to do sth________ 5. 席卷 sweep _through____ 6. 死于 (内因)____die of________死于(外因)__die form____ 7. 对…有害 ___be harmful to sth___________ 8. the fall of the roman empire __________________________ 9. work together without pause ____________________________