at (one's) command
1. 可自由使用(或支配)
She has a large English vocabulary at command.
她能灵活运用掌握的大量英语词汇。
be at sb.'s command
1. 服从某人
I'm always at your command.
我随时听候您的吩咐。
习惯用语at command1.掌握， 可自由使用at sb.'s command1.听某人支配by sb.'s command1.听某人支配at the word of command1.【军】一声令下get command of1.控制have a good command of1.能自由应用He is not fit to command others that cannot command himself.1.[谚]不能指挥自己就不能指挥别人。have at one's command1.能充分掌握high command1.统帅部2.（机关、组织等的）最高领导班子If you command wisely, you'll be obeyed cheerfully.1.[谚]指挥有方， 人人乐从。in command of1.指挥着second in command1.【军】副指挥take command of1.开始担任...指挥under (the) command of1.由...指挥； 在...指挥之下Yours to command1.[古]顿首， 再拜（信尾的谦恭用语， 意即yours obediently1.）command of the air1.制空［海］权command of the sea1.制空［海］权特殊用法action command1.作用指令alarm command1.报警指令assembler directive commands1.汇编程序引导指令assured command1.确定权automatic driver command1.自动驾驶命令automatic scale command1.自动定标指令blank command1.空指令built-in command1.内部指令chain command1.链式指令channel control command1.通道控制命令channel write command1.通道写出命令clear command1.清除指令clear all command1.全清零指令code(d) command1.编码指令conditional transfer command1.条件转移指令control command1.控制指令corrective guidance command1.校正指令信号cut-off command1.关闭指令信号data end command1.数据终端指令device assignment command1.设备赋值命令digital command1.数字指令discrete command1.不连续指令editor command1.编辑程序指令emulation command1.仿真指令engine operation command1.发动机操作指令erase command1.擦除命令execution command1.执行指令external command1.外部命令function command1.功能指令； 操作命令guidance command1.遥控命令， 制导命令hold-over command1.保存命令illegal command1.无效指令， 非法指令inhibit command1.禁止指令initialization command1.起始指令input/output command1.输入/输出指令instruction command1.指令形式的命令logical commands1.逻辑指令loop command1.循环命令macro command1.【自】宏命令merge command1.并［组］合指令micro command1.微指［命］令microcomputer reset command1.微计算机复位指令modifier command1.变址命令multi-tone command1.多音指令object command1.结果指令operational command1.操作［运算］指令preparatory command1.预（指）令print command1.印刷命令program change command1.程序更换命令program(m)ed command1.程序指令radar command1.雷达指挥radio command1.无线电指令read-write command1.读写指令real-time command1.实时指令record command1.录制指令regulating command1.调节指令release command1.释放指令， 复原指令return command1.释放指令， 复原指令remote-control command1.遥控指令save command1.储存指令select command1.选择命令sense command1.读出指令； 检测指令separation command1.分离指令service command1.服务命令set command1.置位指令spool control command1.卷盘控制指令spurious command1.乱真［寄生］命令（信号）station command1.终端命令start I/O command1.起动输入输出指令stereotyped command1.标准指令still command1.静止指令strategic air command1.战略空军tactical air command1.战术空军television command1.电视指令［指挥］timer command1.定时命令tracer command1.跟踪命令transfer command1.转移指令transfer-in-channel command1.通道转换命令translator command1.翻译命令unnumbered command1.非记数［标号］指令user command1.用户命令utility command1.使［实］用命令video sample command1.视频取样指令vocal command1.声指令wideband command1.宽（频）带指令command of the air1.领空权command of the sea1.领海权