配方不一样，后者的氯化钠含量比较高

LB Broth, Miller contains twenty times the sodium chloride level
of Luria Broth Base, Miller and twice the level found in LB Broth,
Lennox.3,5,6 This allows the researcher to select the optimal salt
concentration for a specific strain in LB Agar, Miller.

https://www.bd.com/ds/technicalCenter/inserts/LB_Agar_Lennox.pdf
https://www.bd.com/ds/technicalCenter/inserts/LB_Agar_Miller.pdf

Lennox Formulation
Approximate Formula* Per Liter
Tryptone ...................................................................10.0 g
Yeast Extract .............................................................. 5.0 g
Sodium Chloride ........................................................ 5.0 g
Agar .........................................................................15.0 g
——————————————————————————————

Difco™ LB Agar, Miller
Approximate Formula* Per Liter
Tryptone ...................................................................10.0 g
Yeast Extract .............................................................. 5.0 g
Sodium Chloride ...................................................... 10.0 g
Agar .........................................................................15.0 g，