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I

см. тж. сжиматься; снижаться; уменьшаться

• The range in water level between high and low tide is cut down.

• The base flow declines slowly as the ground-water supply dwindles (or goes down, or reduces).

• Production will be down (or reduced) in the aircraft industry.

• Production has continued to decline (or drop, or fall off).

• The yield falls to 80 percent at 1000°.

• In this atmosphere oxygen is reduced to 100 ppm.

• The life of the machine is impaired by excessive heating.

II (матем.)

• The fraction 4/8 can be cancelled by 2.

• The first terms cancel out only because the second terms do not cancel.

• These terms appear both in the numerator and the denominator, so that they cancel.

III (анат.)

• The muscles contract under the action of the acid.