您要查找的是不是：
- Many natural materials are becoming scarce. 许多天然原料越来越少。
- He's in a bad mood, so I'll make myself scarce. 他情绪不好，我得躲著点。
- Good fruit is scarce in winter and costs a lot. 好的水果冬天难得见到，而且价格昂贵。
- Food was scarce throughout the war. 在战争期间食物匮乏。
- The need to economize scarce energy resources. 节约使用稀有能源的必要性
- Food and fuel were scarce in this region. 这地区食物和燃料都很缺乏。
- Do wolves belong to the canine species? 狼是犬科动物吗？
- We should do our best to save endangered species. 我们应该竭尽全力挽救濒于灭绝的生物。
- This rare bird has become an endangered species. 这种珍禽已成为濒临灭绝的物种。
- Now that oil is scarce, the fate of the motor car is uncertain. 既然石油短缺，那么汽车将来会怎样就难以预料了。
- He was wearing a strange species of hat. 他戴着一种奇怪的帽子。
- They made themselves scarce when they saw the teacher coming. 他们看到老师来了就溜走了。
- There are many species of chrysanthemum. 菊花品种很多。
- Hotel accommodation was scarce during the Olympic Games. 奥运会期间，旅馆房间很难找。
- Today the survival of our species is threatened. 今天人类的生存受到了威胁。
- The giant panda has become an endangered species. 大熊猫已成了一种濒临灭绝的动物。
- Unlike most other bats, this species is diurnal. 这种蝙蝠与大多数蝙蝠不同，是在日间活动的。
- Scarce: Water is scarce in the desert. 在沙漠里水是很难得到的。
- These are duplicates of some scarce books. 这是一些珍本的副本。
- This species of flower flourishes in a warm climate. 这种花在温暖的气候中长得茂盛。
