thinium沙丘群落thinadj.薄的；瘦的；稀的thinly-bedded seam单薄矿层thin spherical shell薄壁球壳体thin wall GM counter薄壁盖革(弥勒)计数管thin oxidation films氧化物薄膜thin-layer culture薄层培养thin-film terminal薄膜引出线thin walled cylinder薄壁圆筒thin-film absorber[化] 膜式吸收器thin slice electrode薄片电极thin shell structure薄壳结构