Interpretation: easy. Try hard once, do things well, and then you can stop trying.
Ban Gu's "Yan Feng Ben Ming Shan" in the Eastern Han Dynasty: "This can be said once and for all. Those who are temporarily restless. "
Method linkage; As predicate, object and attribute; Include praise
For example, Beisixie's "Planting Alfalfa in Qishu": "This thing grows, but the planter ~"
Synonym once and for all
The antonym is futility, futility, get twice the result with half the effort.