guinea-pig

n 1 short-eared animal like a big rat, often kept as a pet 天竺鼠, 豚鼠（常作宠物）. 2 person or animal used in medical or other experiments 供医学或其他实验用的人或动物: localresidents who were unwitting guinea-pigs in the government's nuclear power programme 在政府核电计画中因不知就里而成为实验品的当地居民.

guide-line, guided, guideline, guild, guild-hall, guilder, guile, guileful, guilefully, guileless, guilelessly, guillemot, guillotine, guilt, guiltily, guiltiness, guiltless, guilty, guinea, guinea-fowl, Guinness, guise, guitar, guitarist, gulch, gulden, gulf, Gulf Stream, gull, gullet, gullibility, gullible, gullibly, gully, gulp, gum, gum-tree, gumbo, gumboil, gumboot,