海洋研究の歴史の先駆けとなったのは、探検のための航海だった。

Sentence Analyzer

English Translation

Voyages of exploration were the earliest in the history of studying the ocean.

Furigana

海洋(かいよう)研究(けんきゅう)の歴史(れきし)の先駆(さきが)けとなったのは、探検(たんけん)のための航海(こうかい)だった。

Romanji

Kaiyō kenkyū no rekishi no sakigake to natta no wa, tanken no tame no kōkai datta.

Words

海洋 (かいよう)

ocean

研究 (けんきゅう)

study; research; investigation

の (の)

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

歴史 (れきし)

history

先駆け (さきがけ)

charging ahead of others; the first to charge; pioneer; forerunner; harbinger

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

成る (なる)

to become; to get; to grow; to be; to reach; to attain; to result in; to prove to be; to consist of; to be composed of; to succeed; to be complete; to change into; to be exchanged for; to play a role; to be promoted; to do ...

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

探検 (たんけん)

exploration; expedition

為 (ため)

good; advantage; benefit; welfare; sake; purpose; objective; aim; consequence; result; effect; affecting; regarding; concerning

航海 (こうかい)

sail; voyage

だ (だ)

be; is; indicates past or completed action; indicates light imperative