notadictionary.com
你是一块巧克力
→ “You're a piece of chocolate—cute, sweet, and yummy.”
你 nǐ³ = you — the person being spoken to (informal).
是 shì⁴ = to be — linking verb, like 'are' or 'is'.
一块 yī¹ kuài⁴ = a piece of — quantifier phrase for small, countable items.
一 yī¹ = one — number word.
块 kuài⁴ = piece — common measure word for flat, small objects.
巧克力 qiǎo³kè⁴lì⁴ = chocolate — sweet treat made from cocoa beans.
巧克 qiǎo³ = short for 'chocolate' — a fun, casual way to say it.
克力 kè⁴lì⁴ = the rest of 'chocolate' — completes the word.
notadictionary.com
乖巧可爱又美丽
→ “Cute, sweet, and beautiful.”
乖巧 guāi¹qiǎo³ = well-behaved and cute — describes someone who is obedient and adorable.
乖 guāi¹ = good, well-behaved — often used for children or pets.
巧 qiǎo³ = clever, skillful — adds charm and cuteness.
可爱 kě³'ài⁴ = adorable, lovable — emphasizes charm and appeal.
可 kě³ = can/may — here it means 'able to be', making something 'able to be loved'.
爱 ài⁴ = love — the feeling of affection.
又 yòu⁴ = and also, as well — connects ideas, adding more qualities.
美丽 měi³lì⁴ = beautiful — physical attractiveness.
美 měi³ = beautiful — the quality of being pleasing to the eye.
丽 lì⁴ = beautiful — often paired with 美 to mean 'beautiful'.