天空下的

Jo watched the outline of the town etched against the sky.

乔望着天下十分醒目的整个城镇。

The church tower stood against the sky like a finger pointing towards heaven.

教堂的尖塔天的下宛如指向天的手指。

And all this beheath a sky by nature skyless in which the sun sets without setting at all and hides without hiding behind an unminding cloud.

而这一切都是一个本身没有天的天下发生的，太阳那里一点也不沉落地沉落一点也不隐藏地隐藏一朵非自愿的云团背后。

In order to detect and track dim-point targets under the complex background of sky, a high speed method is put, which uses multiwindow, little yardstick, repetitious subtracting and fusing images.

针对复杂天背景下弱点目标的检测与跟踪,提出了一种窗口、尺度、次差影融合点目标图像的快速检测与跟踪方法。