彼女が僕より数学が得意なのを僕は知った。

Sentence Analyzer

彼女 より 数学 得意な 知った

English Translation

I discovered that she was better at math than I.

Furigana

彼女(かのじょ)(ぼく)より数学(すうがく)得意(とくい)なのを(ぼく)()った。

Romanji

Kanojo ga boku yori sūgaku ga tokuina no o boku wa shitta.

Words

彼女 (かのじょ)
she; her; her; girlfriend; sweetheart
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
(ぼく)
I; me; you; manservant
より (より)
than; from; out of; since; at; on; except; but; other than; more
数学 (すうがく)
mathematics; arithmetic
得意 (とくい)
triumph; prosperity; pride; one's strong point; one's forte; one's specialty; frequent customer (client, etc.)
()
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
()
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
知る (しる)
to be aware of; to know; to be conscious of; to cognize; to cognise; to notice; to feel; to understand; to comprehend; to grasp; to remember; to be acquainted with (a procedure); to experience; to go through; to learn; to be acquainted with (a person); to get to know; to concern

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: ジョ、 ニョ、 ニョウ、 おんな、 め
Meanings: woman, female
Readings: ボク、 しもべ
Meanings: me, I (male)
Readings: スウ、 ス、 サク、 ソク、 シュ、 かず、 かぞ.える、 しばしば、 せ.める、 わずらわ.しい
Meanings: number, strength, fate, law, figures
Readings: ガク、 まな.ぶ
Meanings: study, learning, science
Readings: トク、 え.る、 う.る
Meanings: gain, get, find, earn, acquire, can, may, able to, profit, advantage, benefit
Reading: 
Meanings: idea, mind, heart, taste, thought, desire, care, liking
Readings: チ、 し.る、 し.らせる
Meanings: know, wisdom