To recover the energy, the gas is fed back over the calcium oxide.
为了回收能量，气体重新与氧化钙反应。
Heating this chemical compound drives off carbon dioxide gas, leaving calcium oxide.
这种化合物加热后会排出二氧化碳，产生氧化钙。
Nitrogen-oxide emissions during the cruising portions of the flight fell by around a quarter.
飞行中巡航部分的氮氧化物的排放量下降了四分之一左右。
You could run the reaction, take solid iron and gaseous oxygen, form iron oxide, measure the heat of formation of it, and tabulate it.
你可以进行一个反应，用固态铁和氧气生成氧化铁，测量它生成的热，列成表格。
From the Middle East the Chinese acquired a blue pigment—a purified form of cobalt oxide unobtainable at that time in China—that contained only a low level of manganese.
中国人从中东获得了一种蓝色颜料，这是一种当时在中国很难得到的纯净的氧化钴，这种颜料只含有少量的锰。
The atmosphere has small amounts of nitrous oxide.
大气中含有少量一氧化二氮。
Dentists may give patients nitrous oxide so they will not feel pain.
牙医可能会给病人一氧化二氮，这样他们就不会感到疼痛。
Geologist Gerard Bond noticed that some of the sediment grains were stained with iron oxide, evidence that they originated in locales where glaciers had overrun outcrops of red sandstone.
地质学家杰拉德·邦德注意到，一些沉积物颗粒被氧化铁染色，这表明它们起源于冰川覆盖红砂岩露头的地方。
The main secondary manganese oxide is hollandite.
次生锰氧化物主要为锰钡矿。
Germanium forms an amphoteric oxide GeO2 and anionic germanates, such as Mg2GeO4.
锗形成了两性氧化物 GeO2和阴离子锗酸盐，如 Mg2GeO4。
它含有二氧化铀。
那红的是二氧化铀。
一种是氧化锡铟。
Iron oxide, after all, is not toxic.
毕竟氧化铁是无毒的。
二氧化铀，好了。
How can you get rid of this oxide coating?
你们该怎样除去这些氧化皮？
氮氧化合物。
So we'll have an iron oxide species. It's a solid.
那么我们有氧化铁，它是固体。
Hematite is an iron oxide that is deep red in color.
赤铁矿是一种具有深红颜色的氧化铁。
Oxygen from the air took the place of the cobalt oxide.
空气中的氧气代替了钴氧化物。
The solution is then treated to precipitate uranium oxide.
得到的溶液之后通过处理来析出铀氧化物。
And magnesium oxide has a melting point of 2,800 degrees C.
氧化镁，熔点在2800摄氏度。
As a result: Nitrous oxide became an early form of anesthesia.
结果：一氧化二氮成为一种早期的麻醉剂。
70% of this was caused by methane and nitrous oxide emissions.
其中70%是由甲烷和一氧化二氮的排放造成的。
Nitrogen oxide emissions: 18 million tonnes (30% from vehicles).
氧化氮排放量：1800万吨(30%来自汽车)。
Soil stores organic carbon, but can emit methane and nitrous oxide.
土壤储存有机碳，但会释放甲烷和一氧化二氮。
In this case, copper oxide and strontium carbonate get the job done.
图片中呈现的效果通过使用氧化铜和碳酸锶实现。
In this case, copper oxide and strontium carbonate get the job done.
图片中呈现的效果通过使用氧化铜和碳酸锶实现。
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