Allegations of Chemical Weapons Use in Syria

* investigation: 조사, 수사

* allegation: 혐의, 주장  ex> allegation of dishonesty against him

* hotly contested: 경쟁이 치열한  ex> a hotly contested game/race/election

*  skeptical: 회의적인  be skeptical about ~을 의심하다

* carry out: 실행하다