TOEFL单词短语学习：

miraculous adj. 不可思议的，奇迹的 (adjective):extraordinary, suprising, or unusual
- It was miraculous that everyone escaped from the accident unharmed.

occur vi. 发生；出现；存在 (verb): take place or happen
- Many miraculous events occur around the world every year.

break out v. 爆发；突发 (verb): start suddenly
- War broke out last week in several places in that area of the world.

witness n. 证人；目击者；证据 (noun): a person who sees something happen
- Five witnesses saw the accident on the highway.

evacuate vi. 疏散；撤退；排泄 (verb): move from a dangerous place to safety
- People need to evacuate the city when a dangerous hurricane approaches the coastline.

panic vt. 使恐慌(verb): have a great feeling of fear or anxiety
- Please don't panic. Everything will be okay if you stay calm.