to express worry or doubt about an issue
对某个问题表示担忧或怀疑 (dui mou ge wen ti biao shi dan you huo huai yi)
"Activists raised concern about the pollution levels in the river."
"活动家们提出了关于河流污染程度的关注。" (huo dong jia men ti chu le guan yu he liu wu ran cheng du de guan zhu)
to summarize or conclude by revisiting main ideas
to resume something after a break
to take something from a lower place to a higher place
to cause protests or demonstrations to begin
to successfully enter a new market or industry
to lower the amount of money spent
