浮
力
调
整
背
心
f
ú
l
ì
t
i
á
o
z
h
ě
n
g
b
è
i
x
ī
n
Definitions
1. BCD
2. Buoyancy Compensation Device (diving)
Components
浮力
fú lì
–
buoyancy
调整
tiáo zhěng
–
to adjust
背心
bèi xīn
–
sleeveless garment (vest, waistcoat, singlet, tank top etc)