?极其稀有
As scarce as hen's teeth 极其稀有 Now,the pick and shovel jobs are as scarce as any others. 现在，像其他的活一样，体力活也十分少了。
?非常稀有
... as round as a ball圆得像个皮球 as scarce as hen's teeth非常稀有 as scared as a rabbit惊慌得像兔子一样 ...
?凤毛麟角
... at arm's length若即若离 as scarce as hen's teeth凤毛麟角 grit one's teeth咬紧牙关 ...
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。