A pith helmet, though, he found indispensable in the rainforest.
"The destruction of illegal ivory has become indispensable in the fight against trafficking of threatened species.
Dueling egos notwithstanding, collaboration is indispensable in the theater, Mr. Libin said.
It is not indispensable in the sense that it is not something that we have to take.
That relentlessness could be indispensable in the months ahead, because Mr. Cook may be tested as never before.
Still, despite their loathing of infinity, the Greeks found that the concept was indispensable in the mathematics of continuous magnitudes.
And, in Jobs's case, of making Apple products indispensable in the way a wristwatch, handbag or wallet are to so very many millions of people.
The graphite pencil could be used on almost any type of drawing surface, a fact that helped make it indispensable in the artist's studio.
They are also indispensable in the process of goal-setting.
Accurate pressure and temperature are indispensable in the GNSS water vapor retrievals.
Expert feedback seems to be indispensable in the acquisition of motor skills.
