ramp up

/ˌɹæmp ˈʌp/ 动词

To increase rapidly to a new value. (intransitive) · Near-synonym: build up· Headcount ramped up over three months.
To increase (something) rapidly to a new value; to cause (something) to ramp up. (transitive) · Near-synonym: build up· The manager ramped up headcount.
To start up; to be in an initial phase of rapid increase. (intransitive) · Near-synonyms: fire up, spin up· The 5G development project will ramp up in the first quarter.
To start (something) up; to cause (something) to ramp up. (transitive) · Near-synonyms: fire up, spin up· He wants to be first to ramp up his project.

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