@tintin,
												Quote:
'rests in part'[/] ---> does it mean 'partially' ? or something else is meant ?
 
It means partially, yes.
Quote:'during the first wave of suspension bridge construction' ? wave ? what is found in sea .....what does wave of suspension means here
 
'wave' can mean 'round or group.
1st wave = first group
2nd wave = 2nd group and so on.
It is because waves in the ocean are periodic, and they keep coming...
Quote:bridge's towers should be reinforced to meet anticipated increases in usage. ...reinforced ? are they saying to increase height ? reinforced in what sense ?
 
Reinforced = made stronger.  Probably not height, but mass.
Cycloptichorn