Finches start to moult at around twelve weeks of age.
燕雀大约在12个星期大小的时候开始换羽毛。
That hen has moulted .
那只母鸡秃噜了。
A conceited crow decked herself with the moulted feathers of the handsome peacock .
自负的乌鸦用美丽的孔雀脱换下来的羽毛来装扮自己。