YOU SAID:

Aircraft were willing to develop the

INTO JAPANESE

航空機は開発に意欲的だった

BACK INTO ENGLISH

The aircraft was eager to develop.

INTO JAPANESE

この航空機は開発に熱心だった。

BACK INTO ENGLISH

This aircraft was in hot development.

INTO JAPANESE

この航空機は熱心に開発されていました。

BACK INTO ENGLISH

This aircraft was being actively developed.

INTO JAPANESE

この航空機は積極的に開発されていました。

BACK INTO ENGLISH

This aircraft was under active development.

INTO JAPANESE

この航空機は活発に開発中でした。

BACK INTO ENGLISH

This aircraft was under active development.