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 ...
她的床收拾得很整洁，衣服也收起来了。Her bed was crisply made, her clothes put away.他们急于在下雨前把洗好的衣服收进屋子。They were anxious to bring the washing in before it rained.一些较老式的电话机仍然只收代币。Some of the older telephones still only accept tokens....
He managed to free one hand to ward off a punch.他设法挣脱出一只手来挡住了一拳。Many people swear by vitamin C's ability to ward off colds.许多人深信维生素C能预防感冒。Such a thin padded coat cannot ward off the cold mountain wind.这么薄的棉衣在高山上挡不住寒...
I listened to the thwack of the metal balls.我听着金属球相撞的声音。I never had the balls to do anything like this.我从来没胆量做这种事。Using 2 spoons, mould the cheese mixture into small balls or ovals.用两把小匙将奶酪混合物塑成圆球或椭圆球形状。...
They may even have raced each other — but not regularly.他们甚至可能曾经相互比试过，只不过不是经常性的。He raced ahead up into the bush, barking and snarling.它嗥叫着冲向前，一头钻进了灌木丛。In the 10 years I raced in Europe, 30 drivers were killed.在我10年的欧洲赛车生...