Filling a bulb with an inert gas such as argon or nitrogen slows down the evaporation of the tungsten filament compared to operating it in a vacuum.
I'm sure you understand that we can't have a mere inspector still wet behind the ears running a case of this importance.
To be back to the grind
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Sitting shotgun
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On thin ice
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I'm feeling a bit under the weather today.
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Be hard up
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The speaker broke down in the middle of his speech.
There's no hope for him now because he's lost his tiles and has gone completely crazy.
zero hour
To take to one's heels
