。
She speaks English very well.
Literal
She [topic-は] English [object-を] very skillfully speaks.
Polite present habitual stating a settled fact about her skill. とても is a frequency-neutral intensifier ('very') and pairs with adjectives and adverbs alike — 上手に here is the adverbial of 上手, formed with な-adjective + に. Compared to a periphrastic potential phrasing like 上手に話すことができる, this plain habitual form is more natural in everyday conversation: native speakers tend to reach for the simple shape when describing someone's habitual skill rather than their ability in the abstract.