"keep it in control" is correct and usable in written English.
It is typically used to indicate that something should be managed or restrained in a particular situation. Here is an example: It's important to keep your emotions in control during a job interview.
Although the production was watched closely, Bird commented "They did leave us alone if we kept it in control and showed them we were producing the film responsibly and getting it done on time and doing stuff that was good".
Companies grew and kept IT in-house, originally for cost, control and continuity matters and because "they know how we operate".
Yet Hadley's favorite theme emerges clearly: the heart has no logic, the brain cannot always keep it in rein and nature controls human behavior — not the other way around.
The most common arguments against the Swedish model are those long used in the legalization debate: because prostitution is all but impossible to eradicate, it is better to keep it in the open, with some control.
The firm that emerges from their pages is one that was constantly flying by the seat of its pants, prone to risky decisions with few controls to keep it in check.
The airline said further cost controls would keep it in line for record pre-tax profit of £738m for the year ending in September.
It's one thing to make a fusion bomb, it's a lot harder to get the reaction going and keep it under control in a way that the amount of energy extracted is larger than that expended to initiate and manage the reaction.
However, no matter how hard you throw your yo yo, you'll want to use proper technique to keep it under control — in other words, use the loose bicep-flexing throwing motion described above.
We isolated the sperm recipient, assessed the number of sperm received in its antrum (using bright field and epifluorescence illumination), and either kept it in isolation (i.e. called control treatment), or placed it with a second sperm donor, a coloured GFP individual that had previously been in a GFP × GFP pair (i.e. called competition treatment).
He has shrunk the company by more than half, and he struggles to keep it alive in conditions beyond his control.
