laborious
- adj. 勤劳的；艰苦的；费劲的
英英释意
- 1. characterized by toilsome 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"