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" We were not getting back to people in time , unfortunately , " Ji says . To instruct the General Secretariat , in the most energetic terms , to comply with its obligation to enforce the rules governing official acts of service , one of which is the performance evaluation system , and to properly and promptly provide any assistance that staff members request in this regard . He has also has written several books and articles on law , policy , and other issues . The amount of difference between the several groups - that is the amount of modification which each has undergone - is expressed by such terms as genera , families , orders , and classes . " Before the war began last month , the vast Tuwaitha Nuclear Research Center held 3,896 pounds of partially enriched uranium , more than 94 tons of natural uranium and smaller quantities of cesium , cobalt and strontium , according to reports compiled through the 1990s by inspectors from the International Atomic Energy Agency .