炭黑是不透明的,可以防止辐射热传到推进剂内部.Carbon black is an opacifier which prevents radiant energy transmission to the interior of the propellant.研究了纳米炭黑水泥砂浆的导电性和电热特性.Research of the nano carbon black cement mortar electrical and electro...
你得知道站在哪里观察角度比较理想。You have to know where to stand for a good viewpoint.安德鲁过去只要看见狗，无论在哪里，无论什么狗，都会吓得一动不动。Andrew went rigid when he saw a dog, any dog, anywhere.我有种感觉——我以前曾在哪里见过他。I've got a feeling I've seen him be...
流入湖中的泉水和河水携带了溶于水的硝酸盐和磷酸盐。Springs and rivers that drain into lakes carry dissolved nitrates and phosphates.胡萝卜素不溶于水，但可溶于油类和脂肪。Carotenes are insoluble in water and soluble in oils and fats.皮革上的这种红色染料可溶于水。The red dye on the...