You have already said in your book that "If you want to be effective in self-defence you must develop internal force and practise combat applications" (The Complete Book of Tai Chi Chuan, p. 64).

你门或许都在书里读过这样的话，“如果你想达到技击目的，你就必须练习内劲，并且实践格斗技巧“（太极拳大全，第64页）。