retina视网膜
display–displays(复数)显示屏
tier层，排，列
Display显示器
Apple's updated Retina HD displays are 25% brighter than the screens on last year's iPhones.
苹果手机新的视网膜显示器比老款的显示器亮度增加25%.
Storage 内存
The base model will now include 32GB of storage，the mid-tier model has 128GB and the top tier packs 256GB of storage.
GB=gigabyte /ˈɡɪɡ.ə.baɪt/
普通版的手机内存是32G，中档手机内存是128G，最高内存是256G。
dual camera 双摄像头
The dual camera makes the pictures much better.
双摄像头让拍出的照片更好。
New home button 新的home键
The new iPhone 7 have an updated home button.
IPhone 7有升级换代的home键。
Water and dust-resistance 防水防尘。
