It was far lighter in mass than it really ought to have been.

它的质量比实际应有的质量要轻得多。

And he waved a thin hand which ought really to have been covered with royal signet rings made of rubies.

他挥了挥那只瘦削的手，那只手真该戴上红宝石制成的皇室图章戒指。

The powerful man seeks to be feared, because of his cruelty; but who ought really to be feared but God only?

有权有势的人因为他的残忍而寻求被人畏惧；但除了上帝之外， 谁才是真正值得敬畏的呢？

Now, based on what I know about the game of Go, I would've guessed that it really ought to be on the safe side of that line.

现在， 根据我对围棋的了解，我猜它真的应该在那条线的安全一侧。