external coupling的用法和樣例：
例句
- The expansion-side of the heat-pump is thermally coupled to the heat-source, which is often the external environment.
擴展方面的熱泵熱耦合的熱源，這往往是外部環境。 - The phase holograms are expected to be able to guide the emission straight out from the OLED device and hence the external light coupling efficiency can be improved.
這種相位全像術可以預期將發射出來的光直線導出有機發光二極體元件因此可以改善外部發光耦合效率。
