Although impure liquid hydrazine doesn't explode, it can certainly boil vigorously and spray hot and chemically toxic liquid around, which can endanger the safety of people nearby.
In 1908, Harvey Wiley, who was then the head of the US Food and Drug Administration, sought to have saccharin eliminated from the food supply as an impure additive.
The word 'born' this would be written with the AW as in law vowel, followed by R. When these two sounds come together in the same syllable, like here, the AW as in law vowel is not pure.
“born” 这个词将用 AW as in law 元音书写, 后跟 R。当这两个声音起出现在同个音节中时, 就像这里样, AW as in law 元音是不纯的。
But from another spectroscopic analysis, based on the electrons, they showed that its gold was an impure alloy, in contrast to the near 24-carat version of the metal used for coins made in Rome.
And then you don't need to go take that next dark step to then spend all your time warning everybody else that there's dark people out there with dark motives and all that.