T
adj.费力的；辛苦的；劳苦的
adj.费力的；辛苦的；劳苦的
副词: toilsomely 名词: toilsomeness
英英释义
"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"