陷落带

area of subsidence

band / belt / girdle / ribbon / tire / area / zone / region / CL:條|条[tiao2] / to wear / to carry / to take along / to bear (i.e. to have) / to lead / to bring / to look after / to raise

to leave out / to be missing / to leave behind or forget to bring / to lag or fall behind

colloquial reading for 落[luo4] in certain compounds

to fall or drop / (of the sun) to set / (of a tide) to go out / to lower / to decline or sink / to lag or fall behind / to fall onto / to rest with / to get or receive / to write down / whereabouts / settlement

pitfall / trap / to get stuck / to sink / to cave in / to frame (false charge) / to capture (a city in battle) / to fall (to the enemy) / defect

to surrender (of a fortress) / to fall (to the enemy) / subsidence (of land)