[宁缺毋滥 / 寧缺毋濫, nìng quē wú lànㄋㄧㄥˋ ㄑㄩㄝ ㄨˊ ㄌㄢˋ] better to have nothing (than substandard choice) (成语 saw); would prefer to go without than accept shoddy option#46794
[滥竽充数 / 濫竽充數, làn yú chōng shùㄌㄢˋ ㄩˊ ㄔㄨㄥ ㄕㄨˋ] lit. to play the yu 竽 mouth organ to make up numbers (成语 saw); fig. to make up the numbers with inferior products; to masquerade as having an ability; token member of a group, See Also: 竽, 成语#64503
[滚瓜烂熟 / 滾瓜爛熟, gǔn guā làn shúㄍㄨㄣˇ ㄍㄨㄚ ㄌㄢˋ ㄕㄨˊ] lit. ripe as a melon that rolls from its vine (成语 saw); fig. to know fluently; to know sth inside-out; to know sth by heart#73694