Their high, narrow tails with swept-back tips are almost perfectly adapted to provide propulsion with the least possible effort.
它们又长又细的尾巴配合后掠式的襟翼,完美地适用于最省力的方式提供推动力。
2
This was due to the inclusion of recipes with some high costingredients such as lobster tails which were put in the book todemonstrate the variety of foods which could be consumed on the diet.