I have just heard from my sister, Mary – 我刚收到我妹妹玛丽的一封信

Chinese Sentence: 我刚收到我妹妹玛丽的一封信。 
English Translation: I have just heard from my sister, Mary.

Simplified Traditional Pinyin Tones English
我刚 我剛 wo3 gang1 wǒ gāng I have just
收到 收到 shou1 dao4 shōu dào receive
wo3 I / me / my
妹妹 妹妹 mei4 mei5 mèi mei younger sister / fig. younger woman (esp. girl friend or rival) / CL:個|个
玛丽 瑪麗 Ma3 li4 Mǎ lì Mary / Mali (a person’s name)
de5 de of / structural particle: used before a noun, linking it to preceding possessive or descriptive attributive
yi1 one / 1 / single / a (article) / as soon as / entire / whole / all / throughout
封信 封信 Feng1 xin4 Fēng xìn Letters