To be blunt about the subject, if a bottle of oil does not contain the following basic information then DO NOT buy it look for something that does! 1  The purpose for which it is intended (i.e. 2  Motor oil, Gear oil etc). 3  The viscosity (i.e. 10w-40, 5w-30 etc for Motor oils and 80w-90, 75w-90 etc for Gear oils).
The definition of an incursion is an invasion, or the act of entering into an activity or place. 1  An example of an incursion is a military brigade entering enemy territory. 2  An example of an incursion is taking an art class to get a little experience into painting.
Recursion is applied to problems (situations) where you can break it up (reduce it) into smaller parts, and each part(s) looks similar to the original problem. Good examples of where things that contain smaller parts similar to itself are: 1  tree structure (a branch is like a tree) 2  lists (part of a list is still a list) 3  containers (Russian dolls) 4  sequences (part of a sequence looks like the next) 5  groups of objects (a subgroup is a still a group of objects)