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1. An ocular spot is a pigmented organ or part believed to be sensitive to light.
   眼点是一个被认为感光的着色器官或部位。
2. The second eyespot cell, the pigment cell, confers the directional sensitivity to light.
   第二个眼点细胞，也就是色素细胞，使生物可以感觉到光的方向。