天空下的

The naked tree stood stark against the winter sky, its branches bare and exposed.

光秃秃树在冬日天映衬下显得格外突兀，树枝光秃秃地露在外面。

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

乔望着在天映衬下十分醒目整个城镇。

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

教堂尖塔在天映衬下宛如指向天手指。

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.

这是在个本身没有天天下发生，太阳在那里点也不沉落地沉落点也不隐藏地隐藏在朵非自愿云团背后。

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.

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