以上来源于: WordNet
A giant composite image of the Milky Way's center has been taken by NASA's three Great Observatories - the Hubble and Spitzer Space Telescopes and the Chandra X-ray Observatory.
NASA的三架大型天文台——哈勃太空望远镜、斯皮策太空望远镜与钱德拉X射线天文台近日联合拍摄了一张银河中心区域的大型复合照片。
Today, accelerators producing X-rays, protons, neutrons or heavy ions can be found at every major medical center in the U.S..
如今，全美每个主要医疗中心均具备产生X光、质子、中子或重离子的加速器。
Figure 6 shows the display of the game board with an X now populating the center square.
图6显示了中心方格填充x之后的游戏面板。
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