大型褐藻富含维他命和微量元素.Kelp is rich in vitamins and trace elements.我爸爸非常相信这些维他命药片.My father swears by these vitamin pills.服用大量维他命A可改善暗光适应.Taking large doses of vitamin A can improve one's dark adaptation....
Fiber reactive dyes are from true chemical bounds between dyestuff and fiber.纤维活性染料来源于染料与纤维之间形成的真正化学键.The adsorptive and decolorant capability of attapulgite clay on soluble anion dyes was studied.实验研究了凹凸棒石黏土(下称凹土)对水溶性阴离...
Internally vented carburetors are part of the evaporative control system.内部开有通风口的化油器是燃油蒸发控制系统的组成部分.Water vapor from the evaporative recovery process may be recondensed, and also reused.蒸发回收过程产生的水蒸汽可再冷凝, 也可再用.Several diff...