https://online2.tingclass.net/lesson/shi0529/0009/9907/206.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
concrete 具體的，混凝土的
We still don't have a concrete timeline for the plan.
關(guān)于這個(gè)計(jì)劃，我們還沒有具體的時(shí)間表。
I can't tell you anything concrete.
我也不能跟你說得太具體。
瘋狂練習(xí)吧!
