...r
needs using a lot of ways. For instance,almost all animals have distinct vocals
(声音) that they rely on to
either ask for help, scare away any dangerous animals or look for shelter. But
cats are special creatures who possess amazing vocalization skills. They are
able to have entire conversation...
...e problem of understanding how gestural language came to be supplanted by vocal language, as well as when and why this might have happened.（并列宾语从句） The contracted forms of `be' are used when `be' is a main verb as well as when it is an auxiliary.（并列状语从句）， 但是...