如果被使用，那么仅能从该文件创建一个块。

If it is used, only one chunk will be created from this file.

youdao

由于MTD_BLOCK设备提供象块设备那样的模拟，通常更可取的是在这个模拟基础上创建象FTL和JFFS2那样的文件系统。

Since MTD_BLOCK devices provide block-device-like emulation, it is often preferable to create filesystems like FTL and JFFS2 on top of this emulation.

youdao

MTD_CHAR提供对闪存的原始字符访问，而MTD_BLOCK将闪存设计为可以在上面创建文件系统的常规块设备(象ide磁盘)。

MTD_CHAR provides raw character access to the flash, while MTD_BLOCK projects the flash as a normal block device (like an ide disk), on which a filesystem can be created.

youdao