Strike is the length of the deposit, the long length. Open along...

Strike is the length of the deposit, the long length.

Open along strike means they haven't found the end of the long length yet.

Open at depth and along strike, means along the length of it and down deeper.

Concentration of the resource they get from multiplying the intercepts of the drill holes by the grade by an unknown factor of optimism which is usually wrong.  They use all types of statistical methods to try and convince you, but in effect it's a factor of optimism where it's significantly larger than a factor that would cause the project to be a no go.

Spodumene is the mineral, it's the mineral with the lithium in it.  It comprises about 20% by volume/mass of the ore.  Direct shipping ore is rock that they have dug up and only crushed so that it can be handled easier with conveyors and shiploaders.

Spodumene concentrate is where they put the crushed ore though a continuous centrifuge with some really heavy water (water that they have modified with slimed magnetite to make a really weak paste that makes the bulk solution heavy) such that the lighter rock floats in the heavy water in the centrifuge.

https://www.911metallurgist.com/blog/dense-heavy-medium-separation-hms-dms