1.   A training shell is a generalised tutorial system which can operate with a variety of knowledge bases.

2.   On each plain scarlet wing shell is a rectangular white cloth patch edged on each side with narrow white lace.

3.   Ready to fire, the shell was stacked on a pile near the gun crew.

4.   Suitably sized shells are often in short supply and in some areas this limits the hermit crab population.

5.   The shell is very robust, and inside there are very few, powerful hinge teeth.

6.   Unlike the solid cannon ball a mortar shell is hollow and filled with gunpowder.

7.   While a second airframe shell was built as a back-up, it was destroyed after the plane stopped flying.

8.   Nematode eggs differ greatly in size and shape, and the shell is of variable thickness usually consisting of three layers.