一张频闪观测仪的图，对蟹状星云的中心，进行频闪观测曝光。
A stroboscopic picture, a stroboscopic exposure was made of the center portion of the Crab Nebula.
美国联邦应急管理署（FEMA）发布了一张用“洪峰基线海拔”（BFE）描绘洪涝频发重灾区轮廓的地图。
The Federal Emergency Management Agency (FEMA) publishes maps that designate Special Flood Hazard Areas delineated by a Base Flood Elevation (BFE).
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.
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