これは彼らが世界の磁場を使うことができなかったからでしょう。

Sentence Analyzer

これ 彼ら 世界 磁場 使う こと できなかった から でしょう

English Translation

This may be because they could not use the earth's magnetic field.

Furigana

これは(かれ)らが世界(せかい)磁場(じば)使(つか)うことができなかったからでしょう。

Romanji

Kore wa karera ga sekai no jiba o tsukau koto ga dekinakatta kara deshō.

Words

此れ (これ)
this (indicating an item near the speaker, the action of the speaker, or the current topic); this person (usu. indicating someone in one's in-group); now; here; I (me); certainly
()
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
彼ら (かれら)
they (usually male); them
()
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
世界 (せかい)
the world; society; the universe; sphere; circle; world; renowned; world-famous; well-known outside of Japan; realm governed by one Buddha; space
()
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
磁場 (じば、じじょう)
magnetic field; ambience; atmosphere; focal point
()
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.
使う (つかう)
to use (a thing, method, etc.); to make use of; to put to use; to use (a person, animal, puppet, etc.); to employ; to handle; to manage; to manipulate; to use (time, money, etc.); to spend; to consume; to use (language); to speak
(こと、こん)
thing; matter; incident; occurrence; event; something serious; trouble; crisis; circumstances; situation; state of affairs; work; business; affair; after an inflectable word, creates a noun phrase indicating something the speaker does not feel close to; nominalizing suffix; pretending to ...; playing make-believe ...; alias; aka; nickname; alternative name; also known as
出来る (できる)
to be able (in a position) to do; to be up to the task; to be ready; to be completed; to be made; to be built; to be good at; to be permitted (to do); to become intimate; to take up (with somebody); to grow; to be raised; to become pregnant
から (から)
from (e.g. time, place, numerical quantity); since; from (originator); by; because; since; out of (constituent, part); through (e.g. window, vestibule); after; since
デス (デス)
death

Kanji

Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Readings: セイ、 セ、 ソウ、 よ、 さんじゅう
Meanings: generation, world, society, public
Reading: カイ
Meanings: world, boundary
Reading: 
Meanings: magnet, porcelain
Readings: ジョウ、 チョウ、 ば
Meanings: location, place
使
Readings: シ、 つか.う、 つか.い、 -つか.い、 -づか.い
Meanings: use, send on a mission, order, messenger, envoy, ambassador, cause