s. not widely known; especially valued for its uncommonness
s. recurring only at long intervals
s. not widely distributed
s. having low density
词态变化
比较级:rarer
最高级:rarest
现在分词:raring
常见例句
1
A morbid condition causing a peculiar brownish discoloration of the skin, and thought, at one time, to be due to disease of the suprarenal capsules (two flat triangular bodies covering the upper part of the kidneys), but now known not to be dependent upon this causes exclusively
2
The science of measuring the air, including the doctrine of its pressure, elasticity, rarefaction, and condensation
3
s (rare) of or occurring in summer
4
n a rare immunological disorder characterized by the virtual absence of gamma globulin in the blood and consequent susceptibility to infection
5
n a rare recessive metabolic anomaly marked by ochronosis and the presence of alkapton in the urine
