At the moment oxides of metals such as zinc and copper seem to be the favourites , but tiny tubes made of carbon are also being explored .
目前似乎更青睐于使用锌和铜等金属的氧化物,然而由碳元素组成的微型电子管也正在研发中。
The actual chemical make-up of rocks is complex , so the conventions of petrological analysis pretend that these metals are present in basalt as their oxides .
岩石的化学成分实际上很复杂,因此,岩石学分析的惯例是假定这些金属元素以氧化物的形式存在于岩石中。
It also said it has secured final permits to begin construction of plants that will process the mined rare-earth oxides .
该公司还说,它用于加工稀土氧化物的工厂已经取得最后的建设许可。
The metalysis trick is to do the electrolysis on powdered oxides directly , without melting them .
metalysis公司企望直接电解粉末状的氧化物,而不将其熔化。
Glaze is mostly translucent , but da vinci would also slip in small amounts of pigments , such as manganese and lead oxides .
油彩几乎透明,但达芬奇还会加入少许干粉颜料,比如锰或铅的氧化物。
The halted shipments involved rare earth oxides , rare earth salts and pure rare earth metals - all of which are carefully tracked by customs officials for compliance with government export quotas .
However , replacing the old metal oxides with electrochemically related materials results in a stable but not very efficient battery , unable to store large amount of energy .
用电化学材料替代旧金属氧化物可以增强电池稳定性但是却使它的效率降低,不能存储大量能量了。
In the week of the asilomar meeting science published evidence that more pollutants than previously appreciated , including oxides of sulphur , are getting into the lower stratosphere .
在持续一周的会议期间,科学家证实现在的污染比早先预计的更严重,含硫氧化物进入平流层底部。
The uranium is then dissolved from the beads using a solution of ammonium carbonate and precipitated as " yellow cake " , a mixture of uranium oxides .
接下来,小珠子里头的铀离子会被碳酸铵溶液溶解,其后沉淀,析出“黄饼”,即各种铀氧化物的混合物。
The hidden costs of coal plants include the effects of mercury on wildlife and people , the climate-warming effects of carbon emissions , as well as pollutants such as sulfur dioxide , nitrogen oxides , and particulate matter .