Complex sentence: The one-kilometre-long Tete Suspension Bridge, finished in 1973 by the Portuguese and designed by Edgar Cardoso, is a vital link on the major highway linking not just the northern and southern parts of the country, but Zimbabwe and Malawi as well.
Split into simpler sentences: The one-kilometre-long Tete Suspension Bridge, finished in 1973 by the Portuguese and designed by Edgar Cardoso, is a major transportation facility in the region. It is a vital link on the major highway linking not just northern and southern parts of the country, but Zimbabwe and Malawi as well.