低压强 meaning in English

low pressure

The measure of ellipsometer shows : the refractive index value of c60 cluster films in gas atmosphere is smaller than that of vacuum c60 films ( our measurement result is 1 . 94 ) and refractive index value of c60 cluster films in ar is larger than that in n2 . both refractive index values are nearly the same in lower pressure ( about 1 . 46 ) , but decrease with increasing gas pressure
椭偏仪测量表明：气氛条件下制备的c60薄膜的折射率n比在真空条件下制备的c60薄膜的折射率( 1 . 94 )小；在低压强条件下，不同气氛中制备的样品的折射率也几乎相等；在一定的压强范围内，折射率随着压强的增大而减小。