do one's part

One can do one's part to save the environment and nevertheless have serious doubts about some of the shoot-from-the-hip projections of environmental disaster that get bandied about these days.

With each step, individual performance continues to melt into a collective need to do one's part.

One should endeavor to do one's part of the work cheerfully, and in the spirit of good comradeship, as well as share in the fun.

Their constant demand of one another is "to play the game," that is, to play fair and to do one's part in order to win the game for the good of all.

The standards of teacher and class should be such that probable failure to do one's part in the recitation shall be looked forward to by the child with some apprehension and looked back upon with some regret if not humiliation.