1. Attackers on Tuesday gunned down three women working to administer the polio vaccine in eastern Afghanistan, officials said.
gun down 枪杀
I saw them gun down innocent women and children.
我看到他们枪杀无辜的妇女和儿童
。2. Japan's famous cherry blossoms have reached their flowery peak earlier this year than at any time since formal records started being kept nearly 70 years ago.
at any time 在任何时候
The terrorists can strike at any time without provocation.
恐怖分子可能无缘无故地随时袭击
。