rarest

adj.

最稀罕的；最珍贵的；

1. The rarest quality in an epitaph is truth.
   墓志铭的难能可贵之处是真实。
2. Next to good judgment, diamond and pearl are the rarest things in the world.
   次于真知灼见者，为钻石与珍珠为世上最罕有之物耳。

Rarest first and choke algorithms are enough
Rarest First and Choke Algorithms Are Enough
Trial release of the world's rarest tortoise Geochelone yniphora in Madagascar
How to save the rarest Darwin's finch from extinction: the mangrove finch on Isabela Island.
Role of the AGA/AGG codons, the rarest codons in global gene expression in Escherichia coli
Rarest of the rare: advances in combining evolutionary distinctiveness and scarcity to inform conservation at biogeographical scales
Five years of conserving the ‘world’s rarest snake’, the Antiguan racer Alsophis antiguae
Genetic analyses reveal hybridization but no hybrid swarm in one of the world’s rarest birds
Photoactivation of 180Tam and Its Implications for the Nucleosynthesis of Nature's Rarest Naturally Occurring Isotope
[Conjoined twins--diagnostic problems, difficult decisions in choosing the most optimal management in one of the rarest pathologies ...