Ask not what your country can do for you --ask what you can do for your country.
The first task is to understand the problem, the second to find a solution, and the third to carry it out.
The beauty of literature lies in its ability to connect us across time and space.
Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. Simplicity is the ultimate sophistication.
解释：大多数果实都带有酸味，而覆盆子却是甘甜的，体现了中药味道的多样性。
Happiness cannot be pursued; it must ensue.
