Time alone with the Lord Jesus each day is the indispensable condition of growth and power.
It is well known that knowledge is the indispensable condition for expansion of the mind.
Cultural opening up is an intrinsic feature of advanced culture, and it is an indispensable condition to the construction of advanced culture.
"Where there is solidification, there is air gap", air gap is the indispensable condition for an ingot to be pulled out of a mould smoothly.
To granulate powdery products is one tendency of plastics additives industry because it may improve quality of product, enlarge the sale and is a indispensable condition to enter worldwide market.
