天空下的

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

乔望着天空映衬下十分醒目整个城镇。

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

教堂尖塔天空映衬下宛如指向天空手指。

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.

而这切都是个本身没有天空天空下，太阳那里不沉落地沉落不隐藏地隐藏朵非自愿云团背后。

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.

针对复杂天空背景下弱目标检测与跟踪,提出了种利用多窗口、尺度、次差影融合目标图像快速检测与跟踪方法。