"anything that informs and enlightens," 1863, from eye (n.) + agent noun from open (v.). Earlier "alcoholic drink" especially one taken early in the day (1818).
权威例句
1. He has a visual impairment in the right eye.
他右眼视力有损伤。
2. The worms cannot be seen by the naked eye.
这些虫子用肉眼看不见。
3. Bankers are keeping a wary eye on the outcome.
银行家们对结果保持高度警惕。
4. To improve hand-eye co-ordination, practise throwing and catching balls.
要想提高手眼协调能力,就练习投球和接球。
5. Off-screen, Kathy is under the watchful eye of her father Terry.