1. This rare and expensive food is actually made from the jellylike saliva that swifts (a type of bird) secrete as they line their nests. 这种稀有而昂贵的食品实际上就是由燕子搭建鸟巢时分泌出的晶状唾液制成的。
2. This rare and expensive food is actually made from the jelly like saliva that swifts (a type of bird) secrete as they line their nests. 这种稀有而昂贵的食品实际上就是由燕子搭建鸟巢时分泌出的晶状唾液制成的。
3. I did not realize that as I bound the power of river, swifts and stone into the metal, I also filled the sword with sorrow and the despair of death. 我没有意识到，当我将河流、雨燕和岩石的力量注入剑时，也把对死亡的悲痛和绝望带入其中。
4. The nests in question here are produced by a variety of Swifts, specifically Cave Swifts who produce the nest by spitting a chemical compound that hardens in the air. 我们在这说的燕窝是由多种雨燕生产出来的，尤其是金丝燕在做巢时会排放一种化学混合物，使空气变冷。
5. Bird's nest soup is a delicacy in Chinese cuisine. A few species of swift, the cave swifts, are renowned for building the saliva nests used to produce the unique texture of this soup. 燕窝是一种中国美食，某些品种独特的雨燕是用自己的唾液来筑巢的，这种鸟巢就用来当燕窝的原料。
