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dismount from sth
动词用法：从马、自行车等上面下来；from 后接所下的交通工具，也可省略 from 短语。
She dismounted from her horse and tied it to the fence.
她从马上下来，把马拴在栅栏上。
下马；下车
dismounts — plural of dismount
先理解核心含义，再看它在真实句子里的用法。
下马；下车
the act of getting off a horse or bicycle
She dismounted from her horse and tied it to the fence.
她从马上下来，把马拴在栅栏上。
从所骑物(如滑板)上下来的动作
The act of stepping down from something being ridden, such as a skateboard.
体操运动员从器械上脱离的动作部分
The part of a routine in which the gymnast detaches from an apparatus.
Please dismount before entering the stable.
进入马厩前请下马。
After the ride, we dismounted and led our horses to the water.
骑行结束后，我们下马并把马牵到水边。
She dismounts carefully from her bicycle at the crosswalk.
她在人行横道处小心地下自行车。
动词用法：从马、自行车等上面下来；from 后接所下的交通工具，也可省略 from 短语。
She dismounted from her horse and tied it to the fence.
她从马上下来，把马拴在栅栏上。
动词用法（计算机）：指卸载磁盘分区或卷，相当于 unmount。
Please dismount the volume before you unplug the device.
请先卸载该卷，再拔下设备。
名词用法：表示下马或下车这一动作。
His dismount from the bicycle was a little clumsy.
他从自行车上下来的动作有点笨拙。
Not this
He dismounted down from the horse.
Use this
He dismounted from the horse.
dismount 本身已经包含“从高处/交通工具上下来”的方向，不能再与 down 连用；表示从马、自行车等上面下来时用 dismount from ...。
Not this
She dismounted the horse at the gate.
Use this
She dismounted from the horse at the gate.
表示“从马上下来”时，dismount 是不及物动词，须加 from 再接马；若把马直接作宾语，dismount 的意思就变成了“使（骑手）落马/卸下某物”，不符合原意。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
从马背上下来
She dismounted from her horse and tied it to the post.
她从马背上下来，把马拴在柱子上。
小心下马/下车
Please dismount carefully on slippery ground.
地面湿滑时请小心下马/下车。
平稳的下马动作
The rider’s smooth dismount from the horse impressed the judges.
那位骑手从马背上的平稳下马动作给裁判留下了深刻印象。
卸载（存储）卷
You should dismount the volume before removing the external drive.
在移除外部驱动器之前，你应该卸载该（存储）卷。
下马，跪在黑暗魔君面前。
In 'The Lord of the Rings: The Return of the King', the Mouth of Sauron commands Gandalf and Aragorn to dismount and kneel before the Dark Lord at the Black Gate.
在《指环王：王者归来》中，索伦之口在黑门命令甘道夫和阿拉贡下马，向黑暗魔君下跪。
Use dismounts naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想：dis-（离开）+ mount（登上）→ 登上后再离开，即下马、下车。
语域：mixed 常见场景：horse riding、cycling、formal instructions 日常口语中通常说 get off；dismount 多用于正式说明、马术或骑行场合。
计算机语境中作及物动词，意为“卸除（卷）”，如 dismount a volume。
Dictionary facts from ECDICT, WIKTIONARY.