他兜里硬币的叮当声the jingle of coins in his pocket他们用掷硬币的方法决定谁先去.They flipped a coin to decide who would go first.这两个孩子同意用掷硬币的方法来决定这件事.The two boys agreed to decide the matter by tossing a coin....
The lungs consist of millions of tiny air sacs.肺由数百万个小气囊组成。It consists of a stack of flat, membrane - bounded sacs.它由一大堆扁平的膜缘清楚的囊组成.The testis sacs communicate with the seminal vesicles.精巢囊与储精囊相连....