"the child worked at the multiplication table until she had it down cold"
"work stone into tools"
"process iron"
"work the metal"
1. work on
1. 致力于:每个人都有想法,但是,革新者有意识地致力于(workon)自己的想法,他们把这些想法(them)一追到底,直到这些想法(they) 证明是可行与否(practical or otherwise).
2. 从事于,努力做:wipe out擦去,抹去;消灭,毁灭 |workon从事于,努力做 |work out解决,算出;弄懂,制定出
3. 从事于......工作:before long 不久 |workon 从事于......工作 | beon the safe side 万无一失
4. work on
4. 从事:20.搬新家move to a new house | 21.从事workon | 22.向某人寻求帮助ask sb for help