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Aluminum is naturally strong and lightweight. It's the ideal material for Apple Watch Sport.
鋁堅固而輕盈，堪稱Apple Watch Sport的理想原材料。
Our engineers have custom designed a new alloy.
我們的工程師研發出了一種全新的合金。
It is 60% stronger than standard alloys, but just as light.
它的強度超過普通鋁合金60%，卻輕盈依舊。
This requires precision alloying.
這需要極為精密的合金鑄造技術。
Raw aluminum of exceptional purity is first heated to a molten state. Tightly controlled amounts of magnesium and zinc are then added.
首先，要將高純度的鋁材加熱到熔融狀態，并在添加鎂和鋅時，嚴格控制其比例。
As these elements bind together, they form a protective compound that strengthens the metal.
當這些元素熔煉在一起時，會形成穩定的復合物，使其合金輕度大幅提高。
The alloy is then poured, jet-cooled and cast.
合金經過澆鑄，冷卻，然后成形。
A high temperature treatment minimizes uneven chemistry in the billets and ensures proper grain structure.
再通過高溫處理，將鑄坯中不均勻的部分減至最少，并確保適當的紋理結構。
Next, a finely tuned extrusion process creates a uniform surface free of defects.
接下來，精細調校的擠壓工序會為合金帶來平滑到幾近無瑕的表面。
After being meticulously formed, each case is machined, buffed, and then textured with microscopic zirconia beads to achieve a consistent, satin finish.
進一步精確塑形后，每一個表殼都經過加工，拋光，添加氧化鋯微粒質感，來營造通體一致的磨光表面。
Finally, anodizing creates a hard, clear outer layer that helps protect against dings and scratches.
最后的陽極氧化工藝，會形成一個堅硬而清透的保護層，來防止磕碰和刮擦。
We believe this aluminum alloy sets a new standard. Both in the way it performs, and the way it looks.
我們相信，無論是性能，還是外觀，這款鋁金屬都將開創一個業界的新標準。
