grain drive 中文意思是什麼

grain drive 解釋

grain : n 1 穀物，糧食〈英國叫 corn〉; 谷類植物。2 穀粒，籽粒。3 （沙、金、鹽等的）粒，顆粒，晶粒。4 些微...
drive : vt （drove 〈古語〉 drave; driven; driving）1 驅逐，趕，攆（along; away; back; down; in; off; ou...

The adaptive restructuring has gone through 3 periods, one in which the grain production was taken as the baseline to drive behind the aggregate growth, followed by that the grain production should never be let loose but diversified farming be explored, and then by the phase that targets at the efficient farming for high yield and quality

中國農業適應性結構調整經歷了三個階段：「以糧為綱，全面發展」的階段、「決不放鬆糧食生產、積極發展多種經營」的階段、發展「高產、優質、高效農業」的階段。
In general, polycrystal or twin magnetostrictive materials are used as the drive unit in micro - displacement actuator. however, the displacement output of the actuator under low magnetic field is small and its precision is limited, as a result of motion restriction of magnetic domain walls by grain boundaries in polycrystal or twin magnetostrictve materials

磁致伸縮是一種磁?機械耦合現象，以tb - dy - fe為代表的稀土超磁致伸縮材料，其伸縮量為普通壓電陶瓷的30 - 50倍，響應時間低於10 . 6秒，是理想的位移致動材料。