The unusual childlike quality of the 66-year-old President's speech tends to make him sound sincere.

However, the quality of English teaching tends to be poor.

The quality of the crystals tends to improve as the growth rate is reduced.

The quality of instruction tends to be poor, and nearly half of those who enter do not complete the primary cycle.

At the free markets, where most vegetables are now sold, prices are higher than in state stores, although the quality tends to be better.

There are usually at least two links to the feed and quality tends to be pretty good.

Still, certain qualities tend to stand out as particularly heroic.

But quality and development tended to be highly uneven.

The quality of the earliest recordings tends to obscure this.

And even if they survive, their quality of life tends to be less than a woman's.