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...
The chalky soil around Saumur produces the famous Anjou wines.索米尔周围的白垩质土壤出产著名的安茹葡萄酒。She gathered loose soil and let it filter slowly through her fingers.她捧起疏松的泥土，任其缓缓地从指间漏下。The soil washed from the hills is silting up th...
The weather was unkind to those pipers who played in the morning.坏天气对上午那些风笛吹奏者毫不容情。Warm weather has attracted the flat fish close to shore.煦暖的气候将比目鱼引到了近海。The weather forecast is for showers and overcast skies.天气预报上说多云并伴有...