词汇	宿憂
释义	宿憂 sù yōu积久难除的忧患。宿忧
随便看	sequential reclosing sequential recognition sequential record sequential record access mode sequential redundant access sequential regeneration Sequential regimen sequential regression sequential regression analysis sequential regularity sequential relationship sequential relationship matrix sequential relaxation sequential relay sequential repetition sequential-repetitive sequential replacement sequential request strategy sequential research sequential resonance assignment sequential response model sequential response surface method sequential rest sequential retrieval sequential risk function