weight lightening的用法和樣例：
例句
- Lightweight titanium facesaves weight to reposition CG low and deep for higher launches and longer ball flight.
輕量化鈦桿面減輕了重量，使重心變的更深更低，提供更高的擊球角度與更長的飛行距離。 - A parametric structure model has been established using FEA software ANSYS for an aspherical primary reflector with lightening sector holes.
摘要介紹了一種對反射鏡輕量化結構進行優化設計的方法。
