Yes it is an idiom. It's just that it has minor nuances, it's more like "to be on familiar terms with something", which is basically not "fluent", it's rather "proficient", yes, that's the right word you picked for that matter.
Yes it is an idiom. It's just that it has minor nuances, it's more like "to be on familiar terms with something", which is basically not "fluent", it's rather "proficient", yes, that's the right word you picked for that matter.
Another month ends. All targets met. All systems working. All customers satisfied. All staff eagerly enthusiastic. All pigs fed and ready to fly.
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