介绍了缩二脲在 工农业 上的应用及其合成工艺.In this article the application of biuret in industry & agriculture and its synthetic process are stated.自制的缩二脲产品与羟基丙烯酸树脂所配成的漆具有优良的性能.The paint compounded with the product and hydroxyl acrylic resi...
每到冬天,墨西哥中部的一座孤山顶上就栖满一种橙褐色的大蝴蝶.An isolated mountaintop in central Mexico is covered each winter with orange - and - black monarch butterflies.北溪的服务员收到孤山发来的电报,大感惊诧.The operator at North Creek thought himself crazy when he ...
薄暮充满紫丁香和新翻耕的泥土的香味.Twilight was sweet with the smell of lilac and freshly turned earth.薄暮被萤火虫点缀得金光闪闪.The dusk was gilded with fireflies.薄暮时教士来了.It was dusk when the priest came....