I.down1[美 daʊn, 英 daʊn]副down often appears as the second element of certain verb structures in English (back down, clamp down, tone down, etc). For translations, see the relevant verb entry (back, clamp, tone, etc).
His condition did not respond to therapeutic treatments as he lost control of his bowels and was unable to keep down solid food, living on scalded milk and brandy.
Afterwards, he ordered all medical staff to stop returning combat troops suffering from disease or illness, and instead return them to combat status, using medications to keep down fevers.
The lesser sooty owl is part of the masked group of owls: an important part of the environment because they are efficient predators that keep down rodent populations.
To keep down the oil temperature, the system pressure during transport must be lowered, meaning that the minimum displacement for the motor must be limited to a reasonable value.