37. The Louisiana Purchase of 1803 increased the territory of the United States by (approximate) 846,000 square miles, practically doubling the area of the United States.
approximate如果改成副词的就应该是修饰从句的,但这样它不就跟practically 重复了吗?两个的意思好像差不多啊。
那位能解答一下啊
approximately
adv.
近似地, 大约