Human eyes have three cone cell types, with each type dedicated to receiving either blue, green or red light.
人类拥有三种视锥细胞，每种细胞都有各自的用途，可用于接收蓝色光、绿色光或红色光。
But no cone cells were observed in 10 of the 17 species, while only one type of cone cell appeared to be present in the other 7.
但是17种鲨鱼中有10种都没有视锥细胞，其他7种鲨鱼也都只具有一种单一的视锥细胞。
The scientists, who examined retinas of 17 different species of shark, discovered that the creatures had only one type of colour-sensitive cell, known as a cone cell, in their eyes.
科学家通过调查了17个不同种类的鲨鱼后发现这种生物眼睛内只具有一种感色细胞，称为“视锥细胞”。
Human eyes have three cone cell types, with each type dedicated to receiving either blue, green or red light. This allows most people to tell the difference between different colored objects.
人眼有三种视锥细胞，分别能看到蓝色、绿色与红色的光，这样人们就能识别不同颜色的物体。
By studying ultrasonic amplitude transformers to meet the requirements of an ultrasonic vibration cell cutting system, a new compound cone step type amplitude transformer is constructed.
针对细胞微超声振动切割系统对超声变幅杆的要求，将等截面圆柱形阶梯变幅杆的一端替换成圆锥形变幅杆构成一种复合圆锥阶梯形变幅杆。
By studying ultrasonic amplitude transformers to meet the requirements of an ultrasonic vibration cell cutting system, a new compound cone step type amplitude transformer is constructed.
针对细胞微超声振动切割系统对超声变幅杆的要求，将等截面圆柱形阶梯变幅杆的一端替换成圆锥形变幅杆构成一种复合圆锥阶梯形变幅杆。
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