Traditionally, each Metal texture would require a separate, individual memory allocation from the OS.

此前，每一个 Metal 纹理都需要操作系统单独分配一个独立的内存。

This mechanism allows programs to have flexible memory sizes, called dynamic memory allocation, that appear to be continuous to them.

这种机制允许程序拥有灵活的内存大小， 称为动态内存分配，这对它们来说似乎是连续的。