1. Every time he wanted to come into the garden he would bark until someone opened the gate.
    每当它想到花园里来时，便汪汪叫个不停，直到有人把门打开。

2. While round us bark the mad and hungry dogs
    任凭疯狂的饿犬在身旁吠叫

3. They have also noticed that snakes come out of the ground to freeze to death and that dogs bark a lot, even normally quiet dogs.
    他们还注意到，蛇会爬出地穴而冻死，狗会狂吠不已，甚至那些平常很安静的狗也会叫个不停。

4. Cinchona bark, of course, contains quinine.
    当然，金鸡纳树皮含有奎宁。

5. One of these, the bark of cinchona tree, was found to be excellent for treating malaria.
    其中，人们发现用金鸡纳树皮来治疗疟疾疗效极好。