函数在一点处的定义
function on a point of definition
一点红
sowthistle tasselflower herb
Emilia sonchifolia
herba emiliae
sow thistle tasselflower
一点接地
Single-point Grounding Circuit
one point earthing
one point grounding
earth in one point
ground by one point
one point grounding fault
one-point earth
one-point grounding technique
一点多址
pmp
point to multi point
Point to Multipoint
DRMASS
multiaddress for-one-spot