We took great pain to reach as many conservationists around the world as possible.

英訳に間違いが有れば正してください。

我々は世界中のできるだけ多くの自然保護論者に手を差し伸べるために多大な努力を払った。
We took great pain to reach as many conservationists around the world as possible.

ヒント
努力を払った

答え painをpainsにする

We took great pains to reach as many conservationists around the world as possible.

painは複数になると苦労の意味になる

take pains
苦労する