loop-hole
... 2. [spare time]∶尚未占用的时间 3. [chance;loop-hole]∶可乘之机;漏洞 4. [debt]∶债务 ...
chance
seek a chance ; watch for one's chance
This map has an opportunity ; This map exploit ; This figure had an opportunity
可乘之机,汉语成语,拼音是kě chéng zhī jī,意思是可以利用的时机。出自《晋书·吕纂传》。