Hippocampus: The part of the limbic system that is involved in the acquisition of explicit memory.
海馬：大腦邊緣系統中與獲得外顯記憶有關的部分。
HIV: Human immunodeficiency virus, a virus that attacks white blood cells (T lymphocytes) in human blood, thereby weakening the functioning of the immune system; HIV causes AIDS.
人類免疫缺陷病毒：人體免疫缺陷病毒，一種攻擊人體血液中的白細胞(T淋巴細胞)從而削弱免疫系統功能的病毒；這種病毒會引發艾滋病。
Homeostasis: Constancy or equilibrium of the internal conditions of the body.
內穩態：身體內部條件的平衡或者穩態。
Horizontal Cell: One of the cells that integrate information across the retina; rather than sending signals toward the brain, horizontal cells connect receptors to each other.
水平細胞：視網膜上整合信息的細胞之一；水平細胞不是向大腦發送信號，而是將受體彼此連接起來。