在政治中，如此诚实实属罕见。

Such honesty is ___a ___rarity in politics.

在探险期间，能洗上热水澡是件稀罕事。

During the expedition, hot showers were ___a ___rarity.

如今，不能上网的智能手机已很罕见。

Smartphones without internet access are ___a ___rarity these days.