Sound can be heard in stereo or 3-D. The 3-D method creates sound on all sides of the listener, the company said.

该公司称，使用者可以听到三维立体声，这种三维立体声会环绕着耳朵。

There are 3-D methods (Dialogue, Discussion and Debate) to improve your eloquence.

有三维方法（对话、讨论和辩论）来提高你的口才。