Englishfor English speakers
technique
Noun
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A technique is a specialized and skillful way of doing something.
It is important for pilots to be taught the right technique for the take-off run.
The scientists will use a new technique to measure the exact speed of the moon.
of
Preposition
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Made using.
It is a house of cards.
substitution
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noun
(= replacement)
an event in which one thing is substituted for another
the replacement of lost blood by a transfusion of donor blood
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noun
the act of putting one thing or person in the place of another
he sent Smith in for Jones but the substitution came too late to help