1、Improved optical drive detection and recovery.
改進了光學驅動器檢測和恢復。

2、The optical drive takes the place of -hdc, so you cannot use both options simultaneously.
光驅占用了-hdc的位置，因此不能同時使用這兩個選項。

3、Don't forget, the MacBook Air doesn't come with Ethernet or with an optical drive either.
可別忘了，MacBook Air并不配有以太網和光驅。

4、An external optical drive can be the resolution to the problem, that's for sure.
外置光驅可以解決的問題，這是肯定的。

optical drive翻譯