接着，一台投影仪就直接把一张血管分布图照射到皮肤上。
A projector then shines a map of the vein network directly on the skin.
这是下一张幻灯上的，这是频闪观测仪曝光。
That is what you will see on the next slide, which is a stroboscopic exposure.
用一张纸或聚酯薄膜霞盖在平板仪上，可在制图时作诠释。
A sheet of paper or mylar covering the plane table is annotated during map construction.
取一张纸板或硬纸片，拿着它移近地球仪。
Take a piece of cardboard or stiff paper and hold it out from a globe.
取一张纸板或硬纸片，拿着它移近地球仪。
Take a piece of cardboard or stiff paper and hold it out from a globe.
应用推荐