an in-depth study是什么意思
问题描述：
an in-depth study是什么意思
答
an in-depth study深入研究双语对照词典结果：网络释义1.深入的研究例句:1.For example,an in-depth study of the mechanics of motor cars would tell onenothing about the dynamics of traffic.打个比方,你可能对...