镇白天亮度 town let
天然亮白牙膏 Natural Toothpaste ; natural brightening toothpaste
最明亮的白天 Brightest Day
使夜晚像白天一样明亮 make the night as bring as day ; make the night as bright as day
采用分段线性变换对白天亮背景下低对比度图像序列进行对比度增强，最关键的是分段点的选取。
Selection of the subsection point is the key to enhance low contrast image under light background by subsection linear transformation.
武器操作员在白天亮光下使用一个潜望镜白光瞄准镜（7公里范围）或在不良天气条件或夜间使用热成像去搜寻和定位目标。
The weapon operator search and locate the target using a periscope optical sight (7km range) in day light, or a thermal imager at night or in bad weather conditions.
首先，他们不在白天聚会，要么在天亮前的黎明，要么在天黑后的夜晚。
First, they don't meet in the daytime; they meet either early before light, at dawn, or after dark, at night.
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