How to write 层出不穷层出不穷

to pile on top of one another; layer; stratum; floor (of a building); story; (math.) sheaf; classifier for layers

to go out; to come out; to occur; to produce; to go beyond; to rise; to put forth; to happen; (used after a verb to indicate an outward direction or a positive result); classifier for dramas, plays, operas etc

no; not so; (bound form) not; un-

poor; destitute; to use up; to exhaust; thoroughly; extremely; (coll.) persistently and pointlessly