1.   This is an uncommon situation as experimental experience suggests that the energy change is finite.

2.   But that is not an uncommon situation on long-range commercial aircraft, and none have spontaneously exploded before.

3.   Earlier this spring she had informed specialists in Washington of this not uncommon situation but they overruled her suggestion that she substitute another product.

4.   For example, there is the uncommon situation of critics charging that politicians are basing their actions on moral concerns, with the politicians firmly denying such accusations.

5.   This is not an uncommon situation in the midsize class, however.