To improve the IR absorption of hydrotalcite, we intercalate SO 42 - to partly replace CO 32 - of interlayer.对水滑石红外吸收机理的研究表明,水滑石的层间阴离子起主要作用, 层板具有协同效应.为提高水滑石的红外吸收选择性,通过对不同阴离子的分析和筛选,确定在水滑石层间插入硫酸根.Veiws evidently intercalat...
The synthetic method, main properties and application of alkyl indican has been introduced.本文介绍了烷基糖苷的合成方法, 主要性能和用途.This preparation uses dialkyl imidazole salt, alkyl pyridine salt or caprolactam and fatty acid as reacta...
Heavy thundery rain fell throughout Thursday.星期四下了一整天的雷暴雨。Thundery weather is forecast.天气预报说会有雷雨。The weather had turned warm and thundery overnight.天气一夜之间就转暖，而且雷声阵阵。...
Send a cheque for £18.99 plus £2 for postage and packing.请寄上18.99英镑的支票，外加2英镑的邮资和包装费。Proof of postage will not be accepted as proof of receipt.邮资单据不能当作收据。For foreign orders postage is extra.国外订单邮费另计。...