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1. The Minneapolis area was already on edge because of the trial of the police officer charged with the murder of George Floyd.
on edge 紧张不安;烦躁
She was always on edge before an interview.
她在面试前总是紧张不安。
2. The Biden administration has struck an agreement with Mexico, Honduras and Guatemala, to temporarily surge troops to the border's in an effort to reduce the tide of migration to the US border.
in an effort to 为了;努力
Penny tended to work through her lunch hour in an effort to keep up with her work
为了把活儿干完，彭妮常常午饭时间也要工作。
