Holdren, the center’s director. 長期以來，因赤道地區(qū)云層較厚，成像不清一直是困擾傳統(tǒng)光學傳感器的主要問題?！?/li>
Holdren also acknowledged that the Waxman-Markey bill was not perfect. 霍爾德倫同時承認維克斯曼-馬爾凱法案并非完美。
John Holdren a former Harvard professor and renowned expert on energy and climate -- is here with me on this trip. 另一個是霍爾德倫博士，前哈佛垂錠教授和聞名的能源和汽候專家，他今天與我同行。
Obama's science adviser, John Holdren, said in early April he hoped the announcement would be made within a month. 奧巴馬的科學顧問JohnHoldren在四月早些時候表示他希望任命能在一個月之內完成。
John Holdren, a former Harvard professor and renowned expert on energy and climate -- is here with me on this trip. 另一個是霍爾德倫博士，前哈佛大學教授和著名的能源和氣候專家，他今天與我同行。
John Holdren's recent talk on proliferation hazards of plutonium when reprocessed, and when disposed of in geologic repositories. 最近演說關于當鈽進行再處理時以及當儲存在核廢料儲存場時所造成核擴散的危機。