短语讲解：

1. After news reports said Tuesday morning that Turkey had shot down a Russian war plane, Twitter users declared World War III was near.

shoot down 击落; 朝下射击
例句：He was able to shoot down a flying bird with the bow and arrow.
他张弓搭箭能射落空中的飞鸟。

2. What do you think about these social media trends?

think about 考虑…; 捉摸…
例句：What do you think about the shipment?
你对货运是怎么考虑的？