原文：The strength of American democracy is shown most clearly thro

原文：The strength of American democracy is shown most clearly through the difficulties it can overcome.
译文：通过这一连串的困难，最能体现出美国民主力量的强大。
【正确答案】：
改译：通过克服这一连串的困难，最能体现出美国民主力量的强大。