characterized by effort to the point of exhaustion; especially physical effort;
"worked their arduous way up the mining valley" "a grueling campaign" "hard labor" "heavy work" "heavy going" "spent many laborious hours on the project" "set a punishing pace"
例句
用作形容词(adj.)
To get a state licence, MSBs have to go through a gruelling vetting process.为了得到州内执照，现金回款企业必须通过一段另人精疲力竭的审查过程。
