Meanings

vein of a shrimp (prawn)

yellow-bellied sea snake (Pelamis platura)

historical background

backache

estrangement

to turn one's back to

to be conceited

civil servants

halo effect

backwater

Chinese box turtle (Cuora flavomarginata)

to look away (from)

to work as the backbone (of)

to push someone (towards)

to walk behind someone

couple

even an unruly horse can be tamed

sense of guilty pleasure

negative heliotropism

round back (book spine)