Accustomed though we are to speaking of the films made before 1927 as “silent”，the film has never been，in the full sense of the word, silent.
(倒装accustomed though we are…=though we are accustomed…)
【译句】虽然我们习惯于将1927年以前的电影叫做“无声电影”，但是就“无声’’这个词的完整意义上说，电影从未真正的无声过。
分句1：Accustomed though we are to speaking of the films made before 1927 as “silent”;
分句2：the film has never been silent;
分句3：in the full sense of the word;
本句的难点是在分句1是倒装句，正常语序是Though we are accustomed to speaking of the films made before 1927 as silent. 分句3是一个插入语，嵌套在分句2中，所以本句真正强调的核心是the film has never been silent.