译英文:1.杰克已经对中国很了解了吗?他曾经去过中国.

问题描述:

译英文:1.杰克已经对中国很了解了吗?他曾经去过中国.

has Jack been very understanding of China yet?He had been to China.been very understanding 这句中文译:很了解对吗?