"The beauty" is one English equivalent of the French phrase la belle.
Specifically, the feminine singular definite article la-- which may or may not be included when translating to English -- means "the." The feminine adjective/noun/pronoun belletranslates as "beautiful female, beautiful one, beauty" in this context. The pronunciation will be "lah behl" in French.
À la belle marguerite in French means "to the beautiful daisy" in English.
the beautiful ironworkers
The beautiful province
le belle femme = the beautiful woman
In French, 'Rue de la belle etoile' can be translated in English to:'The beautiful star street'
"Life is beautiful" is an English equivalent of the French phrase La vie est belle. The declarative/exclamatory statement models a difference between the two languages whereby French employs definite articles -- la, in this case -- where English does not use "the." The pronunciation will be "la vee ey bel" in French.
Douce vie! is a French equivalent of the English phrase "Sweet life!" The feminine singular phrase may be preceded immediately by the feminine singular la since French employs definite articles where English uses no "the." The pronunciation will be "(la) doos vee" in French.
La vie in French means "the life" in English.
La chambre in French means "the bedroom" in English.
Belle is a French equivalent of the Italian word bella. The feminine singular adjective translates into English as "beautiful." The pronunciation will be "BEL-la" in Italian and "bel" in French.
"la sœur" is "the sister" in French.
"la baignoire" is "the bathtub" in French.