ram-air

基本解释

To its credit, the high-end Adamo does include 4 GB of built-in RAM, double that of the Air.
值得称道的，高端阿达莫不包括4 GB的内置内存，增加了一倍的空气。
I enjoyed the svelte look and featherweight status of my 11-inch MacBook Air ($999, 1.6 Intel Core 2 Duo, 2 GB RAM, 64 GB flash storage), launched last October.
我自己也买了一台11寸吋的MacBook Air笔记本（价格999美元，1.6英特尔酷睿2处理器，2G内存，64G快闪储存）。这款11寸吋小本于去年10月推出，我非常喜欢它纤细的外观和轻薄的机身。
You can configure the MacBook Air with more storage and more RAM (neither of which are user-upgradable, so you'll need to do this ahead of time if you're going to at all).
你可以为MacBook Air配置更大的储存器和内存（但两者都无法在用户端进升级，所以你得提前将其升级。）