barrier coat

基本解释

Dormancy may be due to the barrier to water and oxygen presented by the seed coat or to abscisic acid produced by the embryo.
休眠可能是由于种皮阻碍水分和氧气的供应或者由于胚合成的脱落酸而造成的。
As the platform clears I see her, standing behind the ticket barrier in a green coat, the lower part of her face buried in a navy scarf.
月台上人群渐渐散去，我看见了她，穿着绿色的大衣站在检票栏杆后面，脸的下半部埋在了深蓝色的头巾后面。
blog.sina.com.cn
Several modified methods and applications for barrier materials in common use, such as blend, compound, coat, surface treatment and stretch orientation, are compared.
改进方法包括共混、复合、涂层、表面处理和拉伸取向工艺等技术。