restricted

adj. 受限制的；保密的

v. 限制（restrict的过去式和过去分词）

英文词源

restricted (adj.): "limited," 1830, past participle adjective from restrict; of documents, etc., "secret, not for public release" it is recorded from 1944. In U.S., restricted was a euphemism for "off-limits to Jews" (1947).
Manager: "I'm sorry, Mr. Marx, but we can't let you use the pool; this country club is restricted."
Groucho: "Well, my daughter's only half-Jewish; could she go in up to her knees?" [there are many versions and variations of this story, dating back to 1970s]

1. These dams have restricted the flow of the river downstream.: 这些堤坝限制了河水顺流而下。

2. Entrance to universities and senior secondary schools was restricted.: 进入大学或高中的资格受到限制。

3. The government imprisoned dissidents, forbade travel, and restricted the press.: 政府囚禁了持不同政见者，禁止出游，并且限制了新闻自由。

4. For the first two weeks patients are restricted to the grounds.: 在头两周里，病人们只能在院子里活动。

5. Inside these zones, traffic speeds are restricted to 20 mph.: 在这些区域内，交通限速是20英里/小时。