The ducklings are cheeping.小鸭咻咻地叫着.The ducklings are swimming close to their mother.小鸭子紧挨着母鸭游水.The ducklings plumped into the water.小鸭子扑嗵扑嗵跳入水中.The ducklings have shed their yellow down.小鸭褪了黄毛....
The end of the hole is hemispherical.小孔端面成半球状.Smooth hemispherical embayments by the intergrowth towards the center are not uncommon.由于向心内生长而形成半球状弯陷的情况是很常见的.The engine has hemispherical or cross flow combustion chambers....