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At high pressure vs Under high pressure

admin Confusing Phrases

at high pressure—

1. (of matter) when strongly pressed:

  • Steam and oxygen at high pressure are introduced at the lower end of the gasifier.

2. acting with great energy and speed:

  • As for Robert, he, of course, was living at high pressure all round.

under high pressure—

1. = at high pressure 1:

  • The new material loses its resistance only under high pressure.

2. when strongly persuaded or compelled:

  • Working under high pressure for sustained periods results in stress.