Because of this coding relationship, triplet of bases is called a codon.由于这种编码关系, 碱基的三联体被称为密码子.The tail feathers are dark blue at their bases, shading to pale blue at their tips.尾羽的根部呈深蓝色，到了尾尖就渐变成淡蓝色。The two hotel-restau...
Some suppliers were selling at a loss to shift stock.一些供应商赔本销售存货。My throat was dry. I was at a loss for words.我喉咙很干，不知说什么才好。I was at a loss for what to do next.下一步该怎么做，我完全没谱。...
Ferries churn the waters of Howe Sound from Langdale to Horseshoe Bay.渡船搅起豪湾的海水，从兰代尔驶向霍斯舒湾。A goose's wings churn the air and leave an air current behind.一只大雁的翅膀扇动空气,在身后留下一股气流.They churn out 3 000 identical toy train...