domain
英 [dəˈmeɪn] 美 [doʊˈmeɪn]
n.
(知识、活动的)领域，范围，范畴;(尤指旧时个人、国家等所拥有或统治的)领土，领地，势力范围;域;定义域;区域
复数： domains
记忆技巧：dom 控制 + ain 表物 → 统治的地方 → 领土
例句
I think probably that the laser has not realised the potential that was expected of it in that domain.
我想可能激光在那个领域并没有充分发挥其潜力。
Is the domain name already registered or still available?
该域名已经被注册还是仍然可用？
This information should be in the public domain.
这一消息应该为公众所知。
