The phrase "a day and keeps" is not correct and does not form a complete or usable expression in written English.
It may be intended to convey a sense of duration or continuity, but it lacks clarity and context.
Example: "He exercises for an hour a day and keeps his energy levels high."
Alternatives: "daily and maintains" or "each day and sustains".
For example, well Jiaoye1 tested initial gas production of 203,000 cubic meters a day and keeps more than 60,000 cubic meters per day after 2 years of production test.
That is nothing when compared to people like rapper Fetty Wap, who says he buys a pair a day, and keeps a house for his clothes, with one whole room filled with Jordans.
Instead of setting an unsustainable daily goal, start with just 5 minutes a day and keep that going for 30 days and then increase it by 2-3 minutes.
"Read once a day and keep the doctor away," Bruno counselled one woman who stopped to pick up a brochure.
They reported to researchers stationed at the schools twice a day and kept diaries on their asthma symptoms and daily activities.
She worked 12 to 14 hours a day and kept four secretaries busy in New York and Florida, the family's second home, where the company had moved its manufacturing operations.
After a meeting March 29 in Vienna of the 11-member organization, 9 OPEC members agreed to raise oil output quotas by about 1.5 million barrels a day and keep prices within a range of $22 to $28.
When she decided to devote herself to golf, she drove as many as 1,000 golf balls a day and kept going until her hands were so blistered they had to be bandaged.
An Australian missionary detained for 13 days in North Korea for trying to spread Christianity has said that he was interrogated for four hours a day and kept under 24-hour guard.
They could have certainly reduced it to 27 million barrels a day and kept the price double of what is it now.
According to Sir David King, the UK's former head scientist and current envoy for climate change, "Opec could have certainly reduced supply to 27 million barrels a day and kept the price double of what is it now.
