金鸡纳树皮

例句：

1. 1. The old tree had such tough, hard-wearing bark that it could withstand the harshestweather conditions.
   这棵老树有着非常坚硬、耐久的树皮，能承受最恶劣的天气。
2. 2.The scientist used a special kind of bark to create a new medicine.
   这位科学家使用一种特殊的树皮来制造一种新的药物。
3. 3. The bark of this tree is known for its medicinal properties.
   这种树的树皮因其药用性质而闻名。