good opportunity, favorable moment
好機がちゃんとここにある、捕まえてみて。
The opportunity is right here—try to seize it.
こんな好機は逃すなよ。
Don't let an opportunity like this pass you by.
彼女にプロポーズする好機はためらわずに利用しろよ。
Don't hesitate to seize the perfect opportunity to propose to her.