The canoe is made from an impermeable wood.独木舟由防水木头制成。The external layer of the skin is relatively impermeable to water.皮肤的外层不透水.Thus clays and shales tend to be impermeable.因此粘土和页岩就往往不透水....
她将零头布凑成整块.She pieced together odds and ends of cloth.广告价格是168美元, 但是店主减去了零头.The advertised price was 168 dollars, but the shopkeeper knocked off the odd shillings.布大部分用完了, 只剩下一些零头.We have used up most of the cloth , and a...
大多数脊索瘤发生在颅底 、 颈椎及荐骨.Most chordomas are found at skull base, sacrum and cervical spine.目的: 细胞外微环境直接影响到体外人转移脊索瘤细胞的表现.Objective. The extracellular microenvironment directly affects metastatic chordoma cell phenotype in vitr...
The preparation of activated carbon with mesopore by catalyst was summarized.总结了催化法制备中孔炭的几种路径.This paper paid the emphasis on the preparation method of the mesopore ACF and absorption property.本文著重阐述中孔活性碳纤维的制造方法及其吸附特性....