凿凿: [书面语] true; certain; verified 短语和例子言之凿凿 say sth. with certainty; 凿凿有据 with irrefutable evidence; supported by irrefutable evidence
应急: meet an urgent need; meet an emergency; meet an contingency; emergency; escape; crash 短语和例子应急之用 meet the need of emergency; 在应急情况下 in case of emergency; 供应急使用 for emergency use; 我们应该对任何应急情
