Pupils usually have difficulty with words ending in sts, dth, pth.
2
No fewer than a quarter of a million free parking spaces are available on the sts.
3
Some officials estimate that betw six or seven thousand persons are now begging in the sts.
4
STS-133 will be a six member crew: Discovery's retirement is well earned.
5
Etoposide given by 72-h infusion is inactive as second-line chemotherapy in STS.
1
NASA has replaced 59 cracked windows since the spaceshuttleprogram began.
2
Mr Hurley was even on the final launch of the spaceshuttleprogram.
3
The accident disrupted the spaceshuttleprogram for 32 months.
4
But Russia's spaceshuttleprogram, the Energia-Buran, was its last big investment in R&D.
5
NASA's spaceshuttleprogram has encountered both glowing support and heated opposition throughout its history.
Ús de space transportation system en anglès
1
The shuttle-or spacetransportationsystem, as the assemblage is known-is basic to future developments in space.
2
Being able to refuel on orbit is key to an agile and fully reusable spacetransportationsystem.
3
Jan. 5, 1972 - President Richard Nixon signs a bill authorizing $5.5 billion to develop a reusable winged spacetransportationsystem called the space shuttle.
4
It's called the SpaceTransportationSystem, but it quickly became known as the Space Shuttle.
5
NASA convinced Congress to designate the space shuttle as the national SpaceTransportationSystem (STS).