| 1. | Allene is an isomer of methyl acetylene .
丙二烯是甲基乙炔的一种异构体。 |
| 2. | That polyacetylenes are present in flames has been demonstrated many times .
已多次证实火焰中存在聚乙炔。 |
| 3. | Incomplete combustion and improper draft conditions can cause ethylene formation .
不完全的燃烧和不适当的通风条件能导致乙炔的产生。 |
| 4. | In the high-pressure system both oxygen and acetylene are used from high-pressure cylinders .
在高压法中，氧气和乙炔都取用于高压瓶。 |
| 5. | This sequence constitutes an efficient method for preparing arylcyclopropylacetylenes .
这种反应构成了制备芳基环丙基乙炔的有效方法。 |
| 6. | In the darkness, the machine gun spat a vindictive white light like an acetylene torch .
机枪在黑暗中吐出一道凶厉的白光，活象一支喷火的乙炔吹管。 |
| 7. | They clearly demonstrated that nitrogenase could catalyze the reduction of acetylene as well as n2
他们明确地证明，固氮酶能催化乙炔以及N2的还原。 |
| 8. | Cuprous acetylide takes the form of a russet or reddish-brown powder, insoluble in water and in the majority of organic solvents .
乙炔亚铜是黄褐色的红棕色的粉末，不溶于水和大多数有机溶剂。 |
| 9. | Acetylene black - determination of apparent specific volume
乙炔炭黑视比容的测定 |
| 10. | Acetylene black - determination of iodine absorption number
乙炔炭黑吸碘值的测定 |
