being careful with small amounts of money but careless with large amounts
小心使用少量的钱，但对大量的钱不小心 (xiaoxin shiyong shaoliang de qian, dan dui daliang de qian bu xiaoxin)
"She refuses to buy a $10 book, but spends $100 on clothes; she's penny wise, pound foolish."
"她拒绝买一本10美元的书，却在衣服上花100美元；她是penny wise, pound foolish。" (Ta jujue mai yiben 10 meiyuan de shu, que zai yifu shang hua 100 meiyuan; ta shi **penny wise, pound foolish**.)
to go ahead or be in front in a competition
to become worse or decline in health
no longer interested or affected by something
to betray someone after pretending to support them
to rely on something when the first option fails
someone or something that brings happiness
