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1·The gas is fed back over the calcium oxide.

气体的反应体现在氧化钙上。

2·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。

3·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。

4·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。

5·Insects produce less ammonia than pig and poultry farming, ten times less methane than livestock, and 300 times less nitrous oxide.

昆虫产生的氨比猪和家禽少，它们产生的甲烷比家畜少十倍，而产生的一氧化二氮比家畜少三百倍。

6·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。

7·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。

8·The atmosphere has small amounts of nitrous oxide.

大气中含有少量一氧化二氮。

9·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。

10·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。

(1)zinc oxiden. 氧化锌

(1)nitric oxide氧化一氮

(1)iron oxide氧化铁

(1)metal oxiden. 金属氧化物；金属氧化物电阻；金属绝缘膜

(1)oxide film氧化膜；氧化物保护膜

(1)ethylene oxide环氧乙烷；乙撑氧