Spontaneous mutations are very rare, and advantageous mutations are even rarer.

Importance of eclogite Eclogite is a rare and important rock because it is formed only by conditions typically found in the mantle or the lowermost part of thickened crust.

These butterflies are rare in our country.

Seasonal variations are pronounced, but extremes in temperature are rare.

True friendships are even rarer than diamonds.

They are rare and are hunted for food.

These are the rarest of all main sequence stars.

Large tracts of forest are now rare in Central America.

Religious tension between Catholics and Protestants in the country has been rare.

Sometimes two verses are sung, and on rare occasions, three.

Frosts are rare in the city they are more common at higher elevations.

They're still very useful.

Marvellous mallows .

Cloud types are mainly low stratus and fog cumuli forms are rare.

Successful Wagnerian sopranos are rare and often Wagnerian roles are performed by Italianate dramatic sopranos.

You're quite forgetful, aren't you?

But it's a very rare occasion where you'll get a kid who is vegan.

Binary stars that are both visual and spectroscopic binaries are rare, and are a precious source of valuable information when found.

In general only one or two verses are sung, but on rare occasions three.

Recurrent novae like RS Ophiuchi (those with periods on the order of decades) are rare.

And they're pretty scary.

I collect rare coins.

Flash floods are rare but have recently occurred around the spring and fall seasons.

They're just not big enough.

The prices here are very reasonable.

Tom and Mary are quite competitive.

The photos are shared in online communities.

However, many are rather poor.

Glasses are not very expensive. They're quite plentiful.

Most ester local anesthetics are metabolized by pseudocholinesterases, while amide local anesthetics are metabolized in the liver.

Good people could be seduced across that line, and under good and some rare circumstances, bad kids could recover with help, with reform, with rehabilitation.

In that case, the consequences are rather severe.

The streets of Hokkaido are very wide.

The furniture in this office is fairly modern.

A variety of pasta dishes are based on it.

But such success stories are far too rare to constitute a golden age of genetics.

Both birds are rare and protected, though some forest is still threatened by logging in addition to the long standing threat of hurricanes.

The principal sources of rare earth elements are the minerals bastnäsite, monazite, and loparite and the lateritic ion adsorption clays.

Some copies with the original artwork still exist, and are now a rare collectors item.

You really think they are very sharp?

His hobby is collecting strange butterflies.

However, a true resonance between the two would be unlikely due to their small masses relative to their large separations, such relationships among asteroids are very rare.

Cushing's disease is rare, a Danish study found an incidence of less than one case per million people per year.

Oil buried deeper entered the gas window of more than 160 C and was converted into natural gas by thermal cracking.

And when you drive, these signs are very important.