不但…而且…； 既…又…

Both New York and London have traffic problems.

纽约和伦敦都存在交通问题。

The secretary both speaks and writes Spanish.

这位秘书不但能讲而且能写西班牙语。

Both teaching and research work are making great strides.

教学与科研都在大踏步前进。

The delegates visited both New York and Boston.

代表们既访问了纽约,又访问了波士顿。