这类新型谐振单元尺寸大大缩小，结构紧凑，为低频段的频率选择性表面阵列的实现提供了可能。
These new resonant cells are greatly reduced in dimensions and very compact in structures, so it is possible to realize the lower frequency selective surface.
研究了诺卡氏菌在不同影响因素条件下，在黄铁矿和闪锌矿表面的选择性吸附。
The selective adsorption of Nocardia on the surface of pyrite and sphalerite was studied under various conditions.
乙基化的选择性则与催化剂的表面酸强度、酸性中心位置和孔道结构等因素有关。
Ethylation selectivity, was affected by strength of surface acid sites, location of acid sites and pore structure.
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