The redesign involved substitution of aluminum lithium for the existing aluminum alloy, thus taking advantage of the greater strength per unit of weight characteristic of the new material.

Steel is an alloy of iron and carbon containing less than 2 per cent of carbon and 1 per cent of manganese (and small amounts of silicon, phosphorous, sulphur and oxygen).

But smallpox eradication was hard it was very, very hard.

It's really hard. And so it's certainly the hard road.

The Crystal Growth of Solid Solution Semiconductors Experiment, using the Advanced Automated Directional Solidification Furnace on its first mission, successfully grew a crystal of mercury cadmium telluride alloy, a semiconductor, to study the physics of additive thermal and composition driven convection during crystal growth.

Summers were hard, hard work, in the heat of Tennessee summers.

And that's hard to that's hard to create but it is coming.

First of all, it's really hard to use really hard to use.

It's hard.

Hard Turkey

Study hard.

Try hard.

A clamshell's hard.

Ethics is hard.

You work hard.

Very very hard.

Asia s Hard Road

Nancy studied hard.

He tries hard.

She worked hard.

He works hard.

It's frozen hard.

Life is hard.

He studied hard.

It's so hard.

Tom studies hard.

Labouring, striving hard.

Labouring, striving hard.

Labouring (hard), weary,

Labouring (hard), weary,

You don't know how hard it is to earn money. Your dad works so hard.

Extra hard land, right?

Extra difficult. Extra hard.

You should work hard.

You must study hard.

You work too hard.

Now some hard stuff.

Being serious is hard.

It's hard to know.

But this is hard.

No. It's too hard.

That's not that hard.

It was pretty hard.

So, that was hard.

Africa s Hard Black Gold