Translation of "Indication" in Japanese

Probably an indication there's not a lot of oxygen.

つまりここは 酸素が少ないんだ

And if that chasm we just crossed is any indication,

この深い谷をこえても

His victory at this age in an international competition is a good indication of a bright future.

この若さで国際大会で優勝するなんて、まさに前途洋洋ですね。