河狸寻找造窝的场所时是很挑剔的.A beaver looking for a building site is very choosy.河狸还不仅仅会造窝.But beavers do more than build their houses.水獭啃倒树木,以便取食物并获得造窝的材料.The beaver chews down trees to get food and material with which to build its ...
Skiers should be particularly choosy about the insurance policy they buy.滑雪者在选择购买保险的问题上应该尤其慎重。It might be worthwhile to consider your attitude to an insurance policy.考虑一下你对投保的看法也许有所助益。Check that your insurance policy cov...
我们得到饱和甘汞电极.We have the saturated calomel electrode.各个医院已经在为缺乏奎宁 、 甘汞 、 鸦片 、 哥罗仿、碘酒等等而发愁.Already the hospitals were worrying about the scarcity of quinine, calomel, opium, chloroform and iodine.以钴标准溶液为滴定剂,铂电极为指示电极,甘汞电极作为参...