叠

重峦叠嶂

chóng luán dié zhàng

range upon range of mountains (idiom)

重叠

chóng dié

to overlap

三叠纪

sān dié jì

Triassic (geological period 250-205m years ago)

二叠纪

èr dié jì

Permian (geological period 292-250m years ago)

动词重叠

dòng cí chóng dié

verb reduplication, used to soften tone or indicate a short action (e.g. 試一試|试一试[shi4 yi1 shi4] or 看看[kan4 kan5])

堆叠

duī dié

to pile up

套叠

tào dié

overlapping

层峦叠嶂

céng luán dié zhàng

range upon range of mountains (idiom)

层叠

céng dié

layer upon layer

层见叠出

céng xiàn dié chū

(idiom) to occur frequently; to occur repeatedly

山峦重叠

shān luán chóng dié

overlapping ranges of high mountains (idiom)

态叠加

tài dié jiā

superposition of states (quantum mechanics)