例句與造句

1. ( 4 ) the composites still contained very small fe2o3 particles ( below 20nm ) , and showed superparamagnetism even after heating at temperature as high as 1200 . ( 5 ) the samples prepared by different methods , when heated at 900 , gave obvious difference in grain size and phases construction
   ( 5 )采用均勻摻雜法和表面包覆法制備的三種fe _ 2o _ 3 - al _ 2o _ 3復(fù)合粉末，在900熱處理時(shí)，樣品在相組成上差別較大， 1200高溫處理后，其相組成和平均晶粒尺寸上的差別變得不明顯。
2. It's difficult to find composite still in a sentence. 用composite still造句挺難的