be a lesson of little worth; not fit to serve as a model; not to be taken as an example; not an example to be followed; not to be taken as authoritative
? 任何人都不是圣人，他所作所為總有～之處。Nobody is a sage. What he does can’t always be an example to be followed.
不足為訓(xùn)bù zú wéi xùn
訓(xùn)：準(zhǔn)則。不值得作為遵循的準(zhǔn)則或效仿的榜樣。not to be taken as an example, not to be taken as authoritative, not an example to be followed, not fit to serve as a model