科学家们很久以前就发现，昼夜光线的变化对于设置生物钟起着重要的作用。
Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks.
肩头挎包：图中面料光滑的粉色背包，可以平缓过渡白天到黑夜光线的不同。
Over the shoulder: This pink satiny knapsack goes seamlessly from day into evening.
这种目镜之所以是绿色的，是因为当使用目镜者摘下目镜时，瞳孔可以继续保持放大状态，这样就可以微弱的光线中保持“夜光眼”。
The reason it's in green is because when you put the unit down, you want your eyes to remain dilated so you can see in dim light.
这种目镜之所以是绿色的，是因为当使用目镜者摘下目镜时，瞳孔可以继续保持放大状态，这样就可以微弱的光线中保持“夜光眼”。
The reason it's in green is because when you put the unit down, you want your eyes to remain dilated so you can see in dim light.
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