Question

历经长达7个年头的苦苦蓄势

Accepted Answer

历经  lì jīng  to experience; to go through长达  cháng dá  to extend as long as; to lengthen out to年头  nián tóu  year; start of the year; whole year; a particular year; many years' duration; epoch; a 苦苦  kǔ kǔ  strenuously; persistently; hard; painful

Expression	历经长达7个年头的苦苦蓄势
Reading	历经 lì jīng to experience; to go through 长达 cháng dá to extend as long as; to lengthen out to 年头 nián tóu year; start of the year; whole year; a particular year; many years' duration; epoch; a 苦苦 kǔ kǔ strenuously; persistently; hard; painful

Year Kǔ 历经长达7个年头的苦苦蓄势 历经 Lì Jīng Experience 长达

Year Kǔ 历经长达7个年头的苦苦蓄势历经 Lì Jīng Experience 长达