集中精力把经济建设搞上去:
go all out for economic development
集中精力去干一项艰巨的工作:
Gather up one's strength for a hard job
我累了就无法集中精力工作。:
I can't concentrate on my work when I'm tired.
我今天必须集中精力搞装饰.:
I must concentrate my energies on decorating today.
也许我当时仍是以失望的态度看待这个世界，但不久，我就无法集中精力，对考试全无热情，也看不到从医的前景。:
Perhaps I was still looking at the world through jaundiced eyes, but I soon became unable to concentrate, to feel enthusiastic about the exam, or to see any future in the medical profession at all.
