Objective to discuss the clinical manifestation, the histopathologic characteristic and the incidence of tumor of nevus sebaceous in different agegrades.
目的探讨皮脂腺痣不同年龄阶段的临床表现、组织病理学特点及肿瘤发生率。
2
As mines age, ore grades decline, since the best stuff is usually dug up first.
随着矿山年龄的增长，铁矿石的等级下滑，因为最好的往往被最先发掘。
3
PERTH, Australia, Dec. 20 (UPI) — Breastfeeding for six months or longer is linked to better grades at age 10, but only in boys, Australian researchers say.