杆状体的光敏度大约是心状体的一万倍.The rods are about 10,000 times as sensitive as the cores.对于重要观察来说,我们需要怎样的视敏度?What visual acuity is required for the most important vision tasks?在摄影技术中, 胶片感光乳剂的光敏度.In photography, the light sensitivity ...
For ten years she dwelled among the nomads of North America.她在北美游牧民中生活了十年。...a country of nomads who raise cattle and camels.饲养牛和骆驼的游牧国度The townsmen despise and cheat the nomads.城镇居民轻视和诈骗游牧民.Nomads have inhabited this re...