Things are known _when they unite with the oxygen of the air.(burn)

Things are known _when they unite with the oxygen of the air.(burn) 英语翻译Reports that say that something hasn't happened are always interesting to me,because as we know,there are known knowns; there are things we know we know.We also know there are known unknowns; that is to say we know there are some things w there are known knowns ;there are things we know we know .We also know there are known unknows ;that is to say we know there are some things we do not know .But there are also unknown unknowns — the ones we don't know we don't know句子成分分 differences among living things of the same kind are known as..相同的种类在现存事物中的不同被称为变异...我翻译的对吗 英语Things are known ______ when they unite with the oxygen of the air.A.to burnB.burnC.burningD.being burning 为什么 英语翻译Personal credit cards are becoming more common in China.Banks and other financial institutions are encouraging their customers to change the way they buy things.Credit cards,otherwise known as “plastic money”,are being offered on very All things are price. strange things are happening Things are fine all things are possible Things Are Changing 歌词 fish are best known for it.best known是什么意思 Drugs are known as psychoactive substances中的known as 翻译：In addition,life is always presenting new things to a child,but those things have lostIn addition,life is always presenting new things to a child,but those things have lost their appeal for the old because they are too----A.well-known Mosaic and Lynx are known to work. how are things with you there are many things（） Where are these things是什么意思