实际上，你可以使用任何单词或声音，只要你能自始至终轻松、一贯的发出这种声音。

The fact is you can use any word or sound you are comfortable with as long as you are consistent.

youdao

实际上，你可以使用任何单词或声音，只要你能自始至终轻松、一贯的发出这种声音。

The fact is you can use any word or sound you are comfortable with as long as you are consistent.

youdao