例句與造句

1. The samples were welded at 750 , 800 , 850 and 900 . the diffusion coefficients ( d ) of cu and ni at interface increased with the increase of welding temperature . and comparing with radiation heating , atom diffusion velocity at interface quickened
   其它條件相同時，分別在750 、 800 、 850 、 900的溫度下采用脈沖大電流加熱連接cu和ni片狀材料，結果表明接觸面處cu和ni的擴散系數隨溫度升高而增大。
2. It's difficult to find diffusion coefficient (d) in a sentence. 用diffusion coefficient (d)造句挺難的