かつてそれら大変有用でした。

かつてそれら大変有用でした。

Once they were very useful.

かつてそれら大変(たいへん)有用(ゆうよう)でした。

Katsute sorera taihen yūyō deshita.

嘗て (かつて、かって)

once; before; formerly; ever; former; ex-; never yet; never before; first time; still not happened

其れ等 (それら)

those (near the second person)

大変 (たいへん)

very; greatly; immense; enormous; great; serious; grave; dreadful; terrible; difficult; hard; major incident; disaster

有用 (ゆうよう)

useful; helpful

デス (デス)

death

Readings: ダイ、タイ、おお-、おお.きい、 -おお.いに

Meanings: large, big

Readings: ヘン、か.わる、か.わり、か.える

Meanings: unusual, change, strange

Readings: ユウ、ウ、あ.る

Meanings: possess, have, exist, happen, occur, approx

Readings: ヨウ、もち.いる

Meanings: utilize, business, service, use, employ