at least one of temperature and pressure of box A should
be higher than xxx of box B.
このxxxには何をいれたらＯＫ？
at least one ofという表現については突っ込まないでくらさい。temperature,
pressure, boxという単語は適当に思いついて書いただけです。
The temperature of box A is higher than that of box B.
The pressure of box A is higher than that of box B.
Both the temperature and the pressure of box A are higher than
those of box B.
ということをいいたいのですが。
